How to implement addition in javascript

How to implement addition in javascript: 1. Create a front-end sample file; 2. Transform the string through the Number() function; 3. Use the "alert(Number(a) b);" method to specify Just add the numbers.

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

How to implement addition in javascript?

First let’s take a look at the following addition operation:

The result obtained in this case is:

But if we encounter the following situation:

Then the value we get is the concatenation of strings:

In this case we need to transform the string, use Number():

to get the correct value:

Recommended study: "javascript basic tutorial"

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