JavaScript implements mutual conversion of data types_javascript skills

All languages ​​have the ability to type conversion, and JavaScript is no exception. It also provides developers with a large number of type conversion access methods. This article will share with you the mutual conversion of data types in js. The specific content is as follows

字符串转换数字
var a = '1';
console.log(+a);
console.log(a++);
console.log(-a+3);
console.log(parseInt(a));
console.log(parseFloat(a));
console.log(Number(a));

数字转换字符串
var a = 1;
a+''
String(a);
a.toFixed();
a.toLocaleString();
a.toPrecision();
a.toString();

数组转字符串
var arr = [1,2,3];
arr.toString();
arr+"";

数组转数字，只能有一位，否则NaN
var arr = [1];
++arr;
+arr;
arr--;
arr-0
arr.toString()-0

The data obtained by js is of string type by default. If you perform numerical operations, you must use parseInt to convert into numerical values.

html code:

Copy code The code is as follows:

js code:

$("#archive").bind('click',function(){
    
  var page=$("input[name='page']").val();
  //要用parseInt进行数值的运算
  $("input[name='page']").val(parseInt(page)+1);  

});

The above is the entire content of this article, I hope it will be helpful to everyone’s study.