118.杨辉三角.js

/*
 * @lc app=leetcode.cn id=118 lang=javascript
 *
 * [118] 杨辉三角
 */

// @lc code=start
/**
 * @param {number} numRows
 * @return {number[][]}
 */
var generate = function(numRows) {
    var pascal = [];
    for (var i = 0; i < numRows; i++) {
        pascal[i] = [];
        pascal[i][0] = 1;
        for (var j = 1; j < i; j++) {
            pascal[i][j] = pascal[i-1][j-1] + pascal[i-1][j]
        }
        pascal[i][i] = 1;
    }
    return pascal;
};
// @lc code=end