JS教程：循环语句

1、while循环写法如下：基本上和c++写法相同var i = 0;while (++i <= 10 ){ console.log("i = " + i);}

2、for循环的写法如下：基本上和c++的写法一样。for (var i =1; i<= 4; i++) { console.log(" i = " + i);}

3、for的另外一个用法c++是没有的。这个写法和python的写法比较像。function Test(){ this.name = "test"; this.num = 14; this.func = function(){ console.log("func") }}var test = new Test();for(keys in test){ console.log(test[keys])}

4、js的forEach不是关键字而是一个接口。接口形式如下：array.forEach(function(currentValue, index, arr), thisValue)例如：var 荏鱿胫协numbers = [123, 12344, 123123, 123];function func(i) { console.log(" i = " +i);}numbers.forEach(func)

5、还用一种循环是用for .. of。这个倒是不常见。var str = "test";for (var s of str) { console.log(s);}