1：把数字转换为字符串的方法

复制代码 代码如下:

var string_value = String(number);

string_value = number.toString();

var n = 17;

binary_string = n.toString(2); //Evaluates to "10001"

octal_string = "0" + n.toString(8); //Evaluates to "021"

hex_string = "0x" + n.toString(16); //Evaluates to "0x11"

var n = 123456.789;

n.toFixed(0); //"1234567"

n.toFixed(2); //"123456.79"

n.toExponential(1); //"1.2e+5"

n.toExponential(3); //"1.235e+5"

n.toPrecision(4); //"1.235e+5"

n.toPrecision(7); //"123456.8"