app.js

//--------------------------------------ChapterNo:01-----------------------------------------

// 1. Write a script to greet your website visitor using JS alert
// box.

// code:
// alert("Good Morning, jhon Doe!");

// 2. Write a script to display following message on your web
// page:

// Code
// alert("Error please enter a valid password!");

// 3. Write a script to display following message on your web
// page: (Hint : Use line break)

// code:
// alert("hi\ni am daniyalali");
// 4. Write a script to display following messages in sequence:

// 5. Generate the following message through browser’s
// developer console:

// code
// alert("Happy landing!");
// alert("Welcome to js");

// 6. Make use of alerts in your new/existing HTML & CSS
// project.

// code

// 7. Practice placement of <script></script> element in
// following sections of your project in exercise 6:
// a. Head
// b. Body (before your page’s HTML)
// ALERTS | JAVASCRIPT
// Page 3 of 3
// c. Body (inside your page’s HTML)
// d. Body (after your page’s HTML)

//--------------------------------------ChapterNo:02-----------------------------------------
// 1. Declare a variable called username.

// Code;
// var username;
//------------------------------------------------------------------------------------------
// 2. Declare a variable called myName & assign to it a string
// that represents your Full Name.

// code:
// var myName="Daniyal";
// var FullName="Daniyal Ali";

//----------------------------------------------------------------------------------------
// 3. Write script to
// a) Declare a JS variable, titled message.
// b) Assign “Hello World” to variable message
// c) Display the message in alert box.

// code:
// var title=alert("Hello World");
//--------------------------------------------------------------------------------------
// 4. Write a script to save student’s bio data in JS variables and
// show the data in alert boxes.
//
// code
// var myName=alert("my name is Daniyal Ali");
// var age=alert("i am 19 year old ");
// var certified=alert("Certified web and mobile developer:");

// Write a script to display the following alert using one JS variable:

// code
// alert("pizza\npizz\npiz\npi\np");

// 6. Declare a variable called email and assign to it a string that
// represents your Email Address(e.g. example@example.com).
// Show the blow mentioned message in an alert box.(Hint: use
// string concatenation)

// Code:
// alert("my email is dav.daniyalali@gamil.com");

// 7. Declare a variable called book & give it the value “A
// smarter way to learn JavaScript”. Display the following
// message in an alert box:

// Code:
//  var message=alert("A smarter way to learn JavaScript");

// 8. Write a script to display this in browser through JS

// code
// document.write("what are you doing bro:");

// 9. Store following string in a variable and show in alert and
// browser through JS
// “▬▬▬▬▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬▬▬▬”

// code
// alert("▬▬▬▬▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬▬▬▬")

// //--------------------------------------ChapterNo:03-----------------------------------------
// 1. Declare a variable called age & assign to it your age. Show
//your age in an alert box.

// code
// var age =alert("I am 19 year Old:");

//---------------------------------------------------------------------------------------
// 2. Declare & initialize a variable to keep track of how many
// times a visitor has visited a web page. Show his/her
// number of visits on your web page. For example: “You
// have visited this site N times”.

// code
// var visitor=alert(" you are visited the website in 15 times:");
// --------------------------------------------------------------------------------------
// 3. Declare a variable called birthYear & assign to it your
// birth year. Show the following message in your browser:

// code
// var birthYear= 2003;
// document.write("My birth year is ", birthYear);
// var type=typeof(birthYear)
// document.write(" the data type of birthYear is : ", type);
//---------------------------------------------------------------------------------------
// 4. A visitor visits an online clothing store
// www.xyzClothing.com . Write a script to store in variables
// the following information:
// a. Visitor’s name
// b. Product title
// c. Quantity i.e. how many products a visitor wants to order.
// Show the following message in your browser: “John
// Doe ordered 5 T-shirt(s) on XYZ Clothing store”.

// code
// var Name="Jhon Doe";
// var tShirt= 10;
// var clothingStore="Abccl othing.com";
// document.write(Name + " "+ "Ordered" +  " " + tShirt + "t-shirt" + " "+ "on" +  " " + clothingStore);

//------------------------------chapter no : 04-----------------------------------------------
// 1. Declare 3 variables in one statement.

// code
// var variableOne=2; variableTwo=3; variableThree=5;
// console.log(variableOne , variableTwo, variableThree);

// 2. Declare 5 legal & 5 illegal variable names.

// code
// --------legal-----------
// var firstName=Daniyal;
// var _lastName=Ali;
// var $rollNo=first;
// var Gender=male;
// var Edu_cation=graduation;

// ---------illegal variable------
// var 1firstName=Daniyal;
// var -lastName=Ali;
// var ?rollNo=first;
// var Gen--der=male;
// var ++Edu_cation=graduation;

// 3. ---Display this in your browser---
// a) A heading stating “Rules for naming JS variables”
// b) Variable names can only contain , Number, string,
// underscore , dollarSign.
// For example $my_1stVariable

// c) Variables must begin with a _underscore_____, ___dollarSign___ or
// ___$_fistName__. For example $name, _name or name
// d) Variable names are "case _sensitive"
// e) Variable names should not be  start with JS __Number__

// -----------------------------Chapter 5-----------------------------------------------------

// Write a program that take two numbers & add them in a
// new variable. Show the result in your browser

// code
// var a=4;
// var b=6;
// document.write("sum of " +" " + a + " + " + b + " = ",a+b);

// 2. Repeat task1 for subtraction, multiplication, division &
// modulus.

// code
// var a=4;
//  var b=6;
// document.write("sum of " +" " + a + " + " + b + " = ",a+b);
// document.write(" ");
// document.write("sum of " +" " + a + " - " + b + " = ",a-b);
// document.write(" ");
// document.write("sum of " +" " + a + " * " + b + " = ",a*b);

// 3. Do the following using JS Mathematic Expressions
// a. Declare a variable.
// b. Show the value of variable in your browser like “Value
// after variable declaration is: ??”.
// c. Initialize the variable with some number.
// d. Show the value of variable in your browser like “Initial
// value: 5”.
// e. Increment the variable.
// f. Show the value of variable in your browser like “Value
// after increment is: 6”.
// g. Add 7 to the variable.
// h. Show the value of variable in your browser like “Value

// code:
// var variable=undefined;
// document.write(variable);
// var num1=7;
// var num2=13;
// var variable=5;
// document.write("initial value"+ " "+(variable) + "<br>");
// incrementValue =(++variable);
// document.write("value after increment" + incrementValue + "<br>");
// additionValue=document.write('Value after addition ' + (num1+incrementValue) + "<br>");
// decrementValue= --num2;
// document.write('Value after decrement ' + (decrementValue) + "<br>");
// document.write(variable+incrementValue);

// 4. Cost of one movie ticket is 600 PKR. Write a script to
// store ticket price in a variable & calculate the cost of buying 5 tickets
// to a movie. Example output:

// code:
// var totalTicket=5;
// ticketPrice=600;
// totalTicketPrice=totalTicket*ticketPrice;
// document.write("Total cost to buy"+ " " + totalTicket +" " + "tickets" + " " + " " + "is" + " " + totalTicketPrice + " " + "Pkr");

// 5. Write a script to display multiplication table of any
// number in your browser.

// code:

// n=5
// for(i=1;i<=10;i++){
//     document.write(n + "X" + i + " = " + n*i + "<br>");
// }

// 6. The Temperature Converter: It’s hot out! Let’s make a
// converter based on the steps here.
// a. Store a Celsius temperature into a variable.
// b. Convert it to Fahrenheit & output “NNoC is NNoF”.
// c. Now store a Fahrenheit temperature into a variable.
// d. Convert it to Celsius & output “NNoF is NNoC”.

// var c=prompt("Enter a temperature in celsius");
// var f=prompt("Enter a temperature in fahrenheit");

// // celsius to  Fahrenheit :
// celsius=(f-32)*5/9;
// fahrenheit=(c*9/5)+32;
// // Fahrenheit to celsius:
// console.log("The temperature of celsius to fahrenheit is",celsius);
// console.log("The temperature of fahrenheit to celsius  is",fahrenheit);

// 7. Write a program to implement checkout process of a
// shopping cart system for an e-commerce website. Store
// the following in variables
// MATH EXPRESSIONS | JAVASCRIPT
// Page 5 of 9
// a. Price of item 1
// b. Price of item 2
// c. Ordered quantity of item 1
// d. Ordered Quantity of item 2
// e. Shipping charges
// Compute the total cost & show the receipt in your browserice of item 1
// code:
// var  PriceItem1=(prompt("Enter a priceitem1:"));
// var  orderedQuantityitem1=(prompt("Enter order quantity:"));

// var  PriceItem2=(prompt("Enter a priceitem2:"));
// var  orderedQuantityitem2=(prompt("Enter order quantity:"));

// document.write("PriceItem1 of is "+ PriceItem1+"<br>");
// document.write("Ordered quantity is "+ orderedQuantityitem1+"<br>");
// document.write("PriceItem2 of  is "+ PriceItem2+"<br>");
// document.write("Ordered quantity is "+ orderedQuantityitem2+"<br>");
// document.write("totalcost is",(PriceItem1*orderedQuantityitem1+PriceItem2*orderedQuantityitem2));

// 8. Store total marks & marks obtained by a student in 2
// variables. Compute the percentage & show the result in your browser
// code:
// var  subMarks1=+prompt("Enter A Subject marks number:");
// var  subMarks2=+prompt("Enter A Subject marks number:");
// obtainMarks=subMarks1+subMarks2;
// totalMarks=200;
// document.write(obtainMarks/totalMarks*100+"%");

// 9. Assume we have 10 US dollars & 25 Saudi Riyals. Write a
// script to convert the total currency to Pakistani Rupees.
// Perform all calculations in a single expression.
// (Exchange rates : 1 US Dollar = 104.80 Pakistani Rupee
// and 1 Saudi Riyal = 28 Pakistani Rupee)

// var rupess=+prompt("Enter pakistani currency:")
// document.write(rupess+"pkr to dollar"+(rupess*177)+"<br>"+ rupess+" pkr to riyal "+(rupess*28)+"<br>");

// Write a program to initialize a variable with some
// number and do arithmetic in following sequence:

// code:
// var add=+prompt("add number");
// var sub=+prompt("subtract Number");
// var multiply=+prompt("multiply a number");
// total=add-sub*multiply;
// document.write(add+"-"+sub+"*"+multiply+" "+"="+total);

// 11. The Age Calculator: Forgot how old someone is?
// Calculate it!
// a. Store the current year in a variable.
// b. Store their birth year in a variable.ir
// c. Calculate their 2 possible ages based on the stored values.

// var birthYear=+prompt("Enter a BirthYear:");
// var currentYear=+prompt("Enter a currentYear:");
// age=currentYear-birthYear;
// document.write("BirthYear"+birthYear+"<br>");
// document.write("currentYear"+currentYear+"<br>");
// document.write("your age is ", age);

// 12. The Geometrizer: Calculate properties of a circle.
// a. Store a radius into a variable.
// MATH EXPRESSIONS | JAVASCRIPT
// Page 8 of 9
// b. Calculate the circumference based on the radius, and
// output “The circumference is NN”.
// (Hint : Circumference of a circle = 2 π r , π = 3.142)
// Calculate the area based on the radius, and output “The
// area is NN”. (Hint : Area of a circle = π r2, π = 3.142)

// code:
// var radius=+prompt("Enter a radius of circle:");
// document.write("Radius"+" "+radius+"<br>");
// coCircle=document.write("circumference of circle is"+2*3.14*radius+"<br>");
// areaCircle=document.write("Radius of circle is"+3.14*(radius*radius));

// 13. The Lifetime Supply Calculator: Ever wonder how
// much a “lifetime supply” of your favorite snack is?
// Wonder no more.
// a. Store your favorite snack into a variable
// b. Store your current age into a variable.
// c. Store a maximum age into a variable.
// d. Store an estimated amount per day (as a number).
// e. Calculate how many would you eat total for the rest of
// your life.

// var age=15;
// var maxAge=65;
// var TotalamountSnackperday=3;
// var totalNeeded = (TotalamountSnackperday * 365) * (maxAge - age);
// var message = 'You will need ' + totalNeeded + ' chocolate chip to last you until the ripe old age of ' + maxAge;
// document.write(message);

// -------------------------Chapter 6 to 9-------------------------------------

// Write a program to take a number in a variable, do the
// required arithmetic to display the following result in your
// browser:

// code
// var a=10;
// document.write(++a + a++ + --a - a--);

// 2. What will be the output in variables a, b & result after
// execution of the following script:
// var a = 2, b = 1;
// var result = --a - --b + ++b + b--;
// Explain the output at each stage:
// --a; = 1
// --a - --b;  1 - 0
// --a - --b + ++b; 1 - 0  + 1
// --a - --b + ++b + b-- = 1 - 0 +1 +1 = 3
// a=2
// b=1
// manually Exceution;
//  --a - --b + ++b + b--
//   1  -  0  +  1  + 1 = 3
// Document.write(--a - --b + ++b + b--);

// 3. Write a program that takes input a name from user &
// greet the user.

// code
// var userName=prompt("Enter a name");
// document.write(userName + " " + "good Morning");
// // 4.
// 5. Write a program to take input a number from user &
// display it’s multiplication table on your browser. If user
// does not enter a new number, multiplication table of 5
// should be displayed by default.

// nhy ho raha ye wala

// 6. Take
// a) Take three subjects name from user and store them in 3
// different variables.
// Part:A
// code
// var user1=prompt("Enter your subject name");
// var user2=prompt("Enter your subject name");
// var user3=prompt("Enter your subjects name");

// b) Total marks for each subject is 100, store it in another
// variable.
// Part:B
// code
// totalMarks=100;

// c) Take obtained marks for first subject from user and
// stored it in different variable.
// Part:C
// code
// var user1=+prompt("Enter you first subject marks:");

// Part:B
// code
// totalMarks=300;

// Part:C
// code
// var firstSubject=+prompt("Enter you first subject marks:");

// d) Take obtained marks for remaining 2 subjects from user
// and store them in variables.

// code
// var user2=+prompt("Enter your marks");
// var user3=+prompt("Enter you marks");

// e) Now calculate total marks and percentage and show the
// result in browser like this.(Hint: user table)

// code
// obtainMArks=('total obtain marks user2' , user1+user2+user3);
// document.write('total obtain marks',obtainMArks);
// ----------percentage---------------------------
// percentage = (obtainMArks)/totalMarks*100;
// document.write("percentage =",percentage);

// -------------------------------Chapter (9 to 11)----------------------------------------

// 1. Write a program to take “city” name as input from user. If
// user enters “Karachi”, welcome the user like this:
// “Welcome to city of lights”

// code
// var city=prompt("Enter City Name:")
// if(city == "karachi"){
//     console.log("“Welcome to city of lights”")
// }
// else{
//     console.log("Invalid!city name")
// }

// 2. Write a program to take “gender” as input from user. If the
// user is male, give the message: Good Morning Sir. If the
// user is female, give the message: Good Morning Ma’am.

// code
// var gender=prompt("Enter You Gender:");
// if(gender=="male"){
//     console.log("Good Morning Sir");
// }
// else if(gender == "female"){
//     console.log("Good Morning Ma’am");
// }
// else{
//     console.log("Invalid! gender.")
// }

// 3. Write a program to take input color of road traffic signal
// from the user & show the message according to this table:
// Signal color Message
// Red Must Stop
// Yellow Ready to move
// Green Move now

// code
// var trafficSignal = prompt("Enter road traffic signal color :");
// if (trafficSignal == "red") {
//   console.log("Red Must Stop");
// } else if (trafficSignal == "yellow") {
//   console.log("Yellow Ready to move");
// }
// else if (trafficSignal == "green") {
//   console.log(" Green Move now");
// }
// else{
//     console.log("Invalid traffic Signal colors");
// }

// 4. Write a program to take input remaining fuel in car (in
//     litres) from user. If the current fuel is less than 0.25litres,
//     show the message “Please refill the fuel in your

// code
// var currentFuel = +prompt("Enter remaining fuel in car (in litres) :");
// if(currentFuel < 0.25){
//     console.log("Please refill the fuel.");
// }
// else{
//     console.log("Fuel Tank is full.");
// }

// 5. Run this script, & check whether alert message would be
// displayed or not. Record the outputs.
// var a = 4;
// if (++a === 5){
// alert("given condition for variable a is true");
// }
// the message is displayed(given condition for variable a is true)

// var b = 82;
// if (b++ === 83){
// alert("given condition for variable b is true");
// }
// wrong progra

//  var c = 12;
// if (c++ === 13){
// alert("condition 1 is true");
// }

// if (c === 13){
// alert("condition 2 is true");
// }
// if (++c < 14){
// alert("condition 3 is true");
// }
// if(c === 14){
// alert("condition 4 is true");
// }

// var materialCost = 20000;
// var laborCost = 2000;
// var totalCost = materialCost + laborCost;
// if (totalCost === laborCost + materialCost){
// alert("The cost equals");
// }

// if("car" < "cat"){
//     alert("car is smaller than cat");
//     }
// right answer  car is smaller than cat

// 6. Write a program to take input the marks obtained in three
// subjects & total marks. Compute & show the resulting
// percentage on your page. Take percentage & compute
// grade as per following table:
// Show the total marks, marks obtained, percentage, grade &
// remarks like:

// code:
// var sub1=+prompt("Enter your Math Marks:");
// var sub2=+prompt("Enter your English Marks:");
// var sub3=+prompt("Enter your Urdu Marks:");
// var sub4=+prompt("Enter your Computer Marks:");
// var sub5=+prompt("Enter your Physics Marks:");
// totalMarks=500;
// console.log("totalMarks=500")
// // obtain marks
// obtainMarks=(sub1+sub2+sub3+sub4+sub5);
// console.log('Obtain marks is',obtainMarks);

// // calculate the percentage
// per=(obtainMarks/totalMarks*100);
// console.log("The total percentage is",per);

// // Grade
// if(per>=80 && per<=100){
//     console.log("your percentage is A+")
//     console.log("Remarks: Excellent");
//   }
//   else if(per>=70 && per<=79){
//     console.log("your percentage is A")
//     console.log("Remarks: Good");
//   }
//   else if(per>=60 && per<=69){
//     console.log("your percentage is B");
//     console.log("Remarks: Nice");
//   }
//   else if(per>=50 && per<=59){
//     console.log("your percentage is C");
//     console.log("Remarks: keep it up");
//   }
//   else if(per>=40 && per<=49){
//     console.log("your percentage is D")
//     console.log("Remarks: keep it up");
//   }
//   else if(per>=0 && per<=39){
//     console.log("your are fail");
//   }
//   else{
//     ('invalid percentage');
//     console.log("Remarks: Looser");
//   }

// 7.Guess game:
// Store a secret number (ranging from 1 to 10) in a variable.
// Prompt user to guess the secret number.
// a. If user guesses the same number, show “Bingo! Correct
// answer”.
// secretNumber=6;
// var guessNumber=+prompt("Guessing number win price:(ranging from 1 to 10)");
// if(guessNumber==secretNumber){
//     console.log("Bingo! Correct");
// }
// else{
//     console.log("Invalid!city name");
//     }

// b. If the guessed number +1 is the secret number, show
// “Close enough to the correct answer”.

// code
// secretNumber=1;
// var guessNumber=+prompt("Guessing number win price:(ranging from 1 to 10)");
// if(guessNumber == secretNumber){
//     console.log(" Correct answer");
// }
// else if( guessNumber>=2 && guessNumber <=5  ){
//     console.log("Close enough but your number to high please choose the low number:");
// }
// else if( guessNumber>=6 && guessNumber <=10 ){
//     console.log("Close enough but your number very very high please choose the low number:");
// }
// else{
//     console.log("Invalid!city number ");
//     }

// 8. Write a program to check whether the given number is
// divisible by 3. Show the message to the user if the number
// is divisible by 3.

// var number=+prompt("check the number is divisible by 3");
// if(number%3 == 0){
//     console.log("the number is divisible by 3");
// }
// else{
//     console.log("the number is not.. divisible by 3");
// }

// 9. Write a program that checks whether the given input is an
// even number or an odd number.

// var checkNum=+prompt("check the number is even or odd:");
// if(checkNum%2 == 0){
//     console.log("The number is even..")
// }
// else{
//     console.log("The number is Odd..");
// }

// 10. Write a program that takes temperature as input and
// shows a message based on following criteria
// a. T > 40 then “It is too hot outside.”
// b. T > 30 then “The Weather today is Normal.”
// c. T > 20 then “Today’s Weather is cool.”
// d. T > 10 then “OMG! Today’s weather is so Cool.”

// var checkTemp=+prompt("check the temperature:");
// if(checkTemp > 40 && checkTemp <= 60 ){
//     console.log("It is too hot outside");
// }
// else if(checkTemp > 30 && checkTemp <= 40 ){
//     console.log("The Weather today is Normal");
// }
// else if(checkTemp > 20 && checkTemp <= 30 ){
//     console.log("Today’s Weather is cool");
// }
// else if(checkTemp > 10 && checkTemp <= 20 ){
//     console.log("OMG! Today’s weather is so Cool");
// }
// else{
//     console.log("Invalid ");
// }

// 11. Write a program to create a calculator for +,-,*, / & %
// using if statements. Take the following input:
// a. First number
// b. Second number
// c. Operation (+, -, *, /, %)
// Compute & show the calculated result to user.

// var num1=+prompt("Enter a  first number:");
// var num2=+prompt("Enter a  Second number:");
// var operator=prompt("Enter operator (+,-,*, / & %)");
// if (operator == "+"){
//     console.log(num1 + "+" + num2 + "=",num1+num2);
// }
// else if (operator == "-"){
//     console.log(num1 + "-" + num2 + "=",num1-num2);
// }
// else if (operator == "/"){
//     console.log(num1 + "/" + num2 + "=",num1/num2);
// }
// else if (operator == "*"){
//     console.log(num1 + "+" + num2 + "=",num1-num2);
// }
// else if (operator == "%"){
//     console.log(num1 + "%" + num2 + "=",num1%num2);
// }
// else{
//     console.log("Invalid operation");
// }

// -------------------------------------------------chapter:12-13----------------------------------------------------------------------
// 1. Write a program that takes a character (number or string)
// in a variable & checks whether the given input is a
// number, uppercase letter or lower case letter. (Hint: ASCII
// codes:- A=65, Z=90, a=97, z=122).

// code:
// var user = prompt(" a word check upercase or lowercase:")
// if((user>="A" || user>="65") && (user<="Z"   || user<="90")){
//     document.write("the letter is uppercase",user)
// }
// else if((user>="a" || user>="96") && (user<="z"   || user<="122")){
//     document.write("the letter is lowercase",user)
// }
// else{
//     document.write("invalid statement:")
// }

// 2. Write a JavaScript program that accept two integers and
// display the larger. Also show if the two integers are equal.

// code :
// document.write("display a large number or equal number on screen <br>");
// user1 = +prompt("Enter a number:");
// user2 = +prompt("Enter a number:");

// if (user1 >= user2) {
//   document.write(user1 + "is greater than" + user2)
// }
// else if(user2>=user1){
//     document.write(user1 + "is lesser than" + user2)
// }
// else{
//     document.write("invalid statement:")
// }

// 3. Write a program that takes input a number from user &
// state whether the number is positive, negative or zero.

// var user=+prompt("check the number is +positive -negative or zero: ")
// if(user>0){
//     document.write("number is positive:")
// }
// else if(user == 0){
//     document.write("the number is zero:")
// }
// else if(user<0){
//     document.write("number is negative:")
// }
// else{
//     document.write("invalid statement")
// }

// 4. Write a program that takes a character (i.e. string of
// length 1) and returns true if it is a vowel, false otherwise

// var user =prompt("check the word is vowel or not:")
// if(user == 'a' || user == 'e' || user == 'i' || user == 'o' || user == 'u'){
//     document.write("the character is vowel..")
// }
// else if(user == 'A' || user == 'E' || user == 'I' || user == 'O' || user == 'U'){
//     document.write("the character is vowel..")
// }
// else{
//     document.write("the character is ..NOT.. vowel")
// }

// 5. Write a program that
// a. Store correct password in a JS variable.
// b. Asks user to enter his/her password
// c. Validate the two passwords:
// i. Check if user has entered password. If not, then
// give message “ Please enter your password”
// ii. Check if both passwords are same. If they are
// same, show message “Correct! The password you
// entered matches the original password”. Show
// “Incorrect password” otherwise.
// var savePassword=123456
// var user=+prompt("Enter a password:")
// if(user == savePassword){
//     document.write("correct!")
// }
// else{
//     document.write('Please enter your correct password')
// }

// 6. This if/else statement does not work. Try to fix it:
// var greeting;
// var hour = 13;
// if (hour < 18) {
// greeting = "Good day";
// else
// greeting = "Good evening";
// }

// code:
// var user=prompt("Enter a hour")
// if (user < 18){
//     document.write("Good day")
// }
// else{
//     document.write("Good evening")
// }
// 7. Write a program that takes time as input from user in 24
// hours clock format like: 1900 = 7pm. Implement the
// following case using if, else & else if statements

// code:
// var user = +prompt("Enter a time hour");
// if ((user >= 0000 && user< 1200)) {
//   document.write("Good Morning");
// } else if (user >= 1200 && user < 1700) {
//   document.write("Good Afternoon");
// } else if (user >= 1700 && user < 2100) {
//   document.write("Good Evening");
// } else if (user >= 2100 && user < 2359) {
//   document.write("Good Morning");
// } else {
//    document.write("invalid statement");
//  }

let reverseArr = "daniyal";

for(i=reverseArr.length; i>=0; i--){
    print(reverseArr[i]);
}