Discuss / JavaScript / 写写

写写

Topic source

wikilike7

#1 Created at ... [Delete] [Delete and Lock User]
var x = 0;
for (var i = 1; i < 100; i = i + 2) {
    x = x + i;
}

wikilike7

#2 Created at ... [Delete] [Delete and Lock User]
for (var i = 0; i < 3; i++) {
    alert(arr[i]);
}

for (var i = 2; i >= 0; i--) {
    alert(arr[i]);
}

wikilike7

#3 Created at ... [Delete] [Delete and Lock User]
  • 写错了不能修改比较不开心
  • 看到别人写的比我好,我重新修改下
    var arr = ['Bart', 'Lisa', 'Adam'];
    for (var i = 0; i < arr.length; i++) {
        console.log(arr[i]);
    }

    var arr = ['Bart', 'Lisa', 'Adam'];
    for (var i = arr.length; i >= 0; i--) {
        console.log(arr[i]);
    }

wikilike7

#4 Created at ... [Delete] [Delete and Lock User]
  • 没看清题目,还得重来
    var arr = ['Bart', 'Lisa', 'Adam'];
    for (var i = 0; i < arr.length; i++) {
        console.log("Hello," + arr[i] + "!");
    }

    var arr = ['Bart', 'Lisa', 'Adam'];
    for (var i = arr.length; i >= 0; i--) {
        console.log("Hello," + arr[i] + "!");
    }

wikilike7

#5 Created at ... [Delete] [Delete and Lock User]
  • 用while来写,注意下空格

正序

    var arr = ['Bart', 'Lisa', 'Adam'];
    var i = 0;
    while(i < arr.length) {
        alert("Hello," + " " + arr[i] + "!");
        i++;
    }

wikilike7

#6 Created at ... [Delete] [Delete and Lock User]

Reverse

    'use strict';
    var arr = ['Bart', 'Lisa', 'Adam'];

    var i = arr.length - 1;
    while(i < arr.length && i >= 0) {
        alert("Hello," + " " + arr[i]) + "!";
        i--;
    }

  • 1

Reply