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Case Analysis of JavaScript variable usage

2025-04-03 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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This article mainly explains the "JavaScript variable use case analysis", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in-depth, together to study and learn "JavaScript variable use case analysis" bar!

JavaScript variable

Variables are "containers" used to store information.

Example

Varx=5

Vary=6

Varz=x+y

Just like algebra.

Xero5

Yizhi6

Z=x+y

In algebra, we use letters (such as x) to preserve values (such as 5).

From the expression z=x+y above, we can calculate that the value of z is 11.

In JavaScript, these letters are called variables.

Lamp you can think of variables as containers for storing data.

JavaScript variable

Like algebra, the JavaScript variable can be used to store values (such as XForm5) and expressions (such as z=x+y).

Variables can use short names (such as x and y) or more descriptive names (such as age,sum,totalvolume).

Variables must start with a letter

Variables can also start with the $and _ symbols (although we do not recommend this)

Variable names are case-sensitive (y and Y are different variables)

Both lampJavaScript statements and JavaScript variables are case-sensitive.

Thank you for your reading, the above is the content of "case analysis of the use of JavaScript variables", after the study of this article, I believe you have a deeper understanding of the problem of case analysis of the use of JavaScript variables, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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