乘法表

/*
 * 输入数字3，生成3*3的数字乘法表。
 * */

function mulTable(num) {
    "use strict";
    let table = new Array(num), len = table.length;

    for (let i = 0; i < len; i++) {
        table[i] = new Array(num);
    }
    for (let row = 0; row < len; row++) {

        for (let col = 0, len = table[row].length; col < len; col++) {
            table[row][col] =""+row+"*"+col+"=" +row * col;
        }
    }
    return table;
}

console.log(mulTable(4));