JavaScript converts data types and javascript converts data types.

JavaScript converts data types and javascript converts data types.

All languages have the ability to convert data types, and javascript is no exception. It also provides developers with a large number of type conversion access methods. This article will share with you how js achieves mutual conversion of data types, the details are as follows:

String Conversion number 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); Numeric conversion String var a = 1; a + ''String (a);. toFixed ();. toLocaleString ();. toPrecision ();. toString (); array to string var arr = [1, 2, 3]; arr. toString (); arr + ""; array to numeric, only one digit, otherwise NaNvar arr = [1]; ++ arr; + arr; arr --; arr-0arr.toString ()-0

The data obtained by js is of the string type by default. If you perform a numerical operation, you must use parseInt to convert the data to a numerical value.

Html code:

Copy codeThe Code is as follows:
<Div id = "archive">
<Input type = "hidden" name = "page" value = "1"/>
</Div>

Js Code:

$ ("# Archive "). bind ('click', function () {var page = $ ("input [name = 'page']"). val (); // calculate the value using parseInt $ ("input [name = 'page']"). val (parseInt (page) + 1 );});

The above is all the content of this article, hoping to help you learn.

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