counter_function.js

// Problem:
// Write a function that keeps track of how many times it was called and returns that number.
// all functionality should be inside of the function - none outside

function myFunc() {
    let count = 0;

    return function () {
        count++;
        return count;
    };
}

console.log(myFunc());

const instanceOne = myFunc();
const instanceTwo = myFunc();

console.log('instanceOne: ', instanceOne());
console.log('instanceOne: ', instanceOne());
console.log('instanceOne: ', instanceOne());
console.log('instanceTwo: ', instanceTwo());
console.log('instanceTwo: ', instanceTwo());
console.log('instanceOne: ', instanceOne());