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This article mainly introduces the relevant knowledge of "what is the meaning of JavaScript value, literal quantity, variable". The editor shows you the operation process through an actual case. The method of operation is simple and fast, and it is practical. I hope this article "what is the meaning of JavaScript value, literal quantity and variables" can help you solve the problem.

JavaScript syntax is a set of rules that define the language structure of JavaScript.

Var x, y; / / how to declare variables

X = 7; y = 8; / / how to assign a value

Z = x + y; / / how to calculate the value

JavaScript value

The JavaScript statement defines two types of values: mixed values and variable values.

Mixed values are called literal quantities (literal). Variable values are called variables.

JavaScript literal quantity

The most important rule for writing mixed values is:

You can write a value with or without decimal point:

15.90

10011

A string is text, enclosed in double or single quotation marks:

"Bill Gates"

'Bill Gates'

JavaScript variable

In a programming language, variables are used to store data values.

JavaScript uses the var keyword to declare variables.

The = sign is used to assign values to variables.

In this case, x is defined as a variable. Then, x is assigned a value of 7:

Var x

X = 7

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