1.字符串翻转
//字符串'123456' 翻转成'654321'
function reverse(s){
var arr = '' for(var i = s.length-1;i>0;i--){
str += s[i] return str
}
}
var str = '123456'
str = reverse(str)
document.write(str)
2.JS实现冒泡排序
var arr = [10,24,23,11,16,45,82,94,12]; // 遍历数组
for (var i = 0; i < arr.length - 1; i++) { // 这里要根据外层for循环的 i ，逐渐减少内层 for 循环的次数
for (var j = 0; j < arr.length - 1 - i; j++) {
if (arr[j] > arr[j + 1]) {
var num = arr[j]; arr[j] = arr[j + 1]; arr[j + 1] = num;
}
}
}
document.write(arr)//10,11,12,16,23,24,45,82,94
