转换字符串toString()方法的简单应用

toString

可以传一个参数改变输出的进制

let num = 10;

console.log(num.toString()); // "10"

console.log(num.toString(2)); // "1010"

console.log(num.toString(8)); // "12"

console.log(num.toString(10)); // "10"

console.log(num.toString(16)); // "a"

 

使用String方法：

let value1 = 10;

let value2 = true;

let value3 = null;

let value4;

console.log(String(value1)); // "10"

console.log(String(value2)); // "true"

console.log(String(value3)); // "null"

console.log(String(value4)); // "undefined"