js数字转字符串的几种方法

利用toString()方法

var a = 5.000;
var b = 0.12345;
var c = 1e-3;
console.log(a.toString());  //5
console.log(b.toString());  //0.12345
console.log(c.toString());  //0.001

利用加号“+”运算符

var n = 123456789;
n = n + "";
console.log(typeof n); //string