What is the meaning of JavaScript value, literal quantity, variable

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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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