Usage of Number(object) function in javaScript

JavaScript Number() function

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//javaScript中Number(object)函数的用法
//Number()函数的作用就是把对象的值转换为数字。看如下代码：
var test1= new Date();
//如果参数是Date类型的对象，Number()返回从1970年1月1日至今的毫秒数。
console.log(Number(test1));

var test2= new Boolean(true);
var test3= new Boolean(false);
console.log(Number(test2)); //1
console.log(Number(test3)); //0

if(true == 1){
	console.log("在js中，true会自动转换成1");	
}

if(false == 0){
	console.log("在js中，false会自动转换成0");	
}

var test4= new String("666");
var test5= new String("888 999");
console.log(Number(test4)); //666
//如果对象的值无法转换为数字，那么Number()函数返回NaN。
console.log(Number(test5)); //NaN

var test6 = "江西省赣州市于都县";
var test7 = "23";
var test8 = 94;
var test9 = "257于都县";
console.log(Number(test6)); //NaN
console.log(Number(test7)); //23
console.log(Number(test8)); //94
console.log(Number(test9)); //NaN

The results of the operation are as follows: