JavaScript operators

Operator = is used for assignment.

Operator + is used to add value.

Operator = is used to assign values to JavaScript variables.

The arithmetic operator + is used to add values.

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Example

     
  
点击按钮计算 x 的值.
 点击这里 
   

Run the program and try it

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JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic operations between variables and/or values.

Given y=5, the following table explains these arithmetic operators:

##% Find the remainder (keep the integer) x=y%2 x=1 ++ accumulation x=++y x=6 -- Decreasing x=--y x=4

Operator	Description	Example	Result
+	Add	x=y+2	x=7
-	minus	x=y-2	x=3
*	Multiply	x=y*2	x=10
/	divide	x=y/2	x=2.5

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JavaScript assignment operator

The assignment operator is used to assign values to JavaScript variables.

Given x=10 and y=5, the following table explains the assignment operators:

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+ operator for strings

+ operator is used to convert a text value or String variables are added together (concatenated).

To connect two or more string variables, please use the + operator.

Example

If you need to connect two or more string variables, please use the + operator:

     
  
点击按钮创建及增加字符串变量。
 点击这里 
   

Run the program and try it

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To add spaces between two strings, you need to insert spaces into a string:

     
  
点击按钮创建及增加字符串变量。
 点击这里 
   

Run the program and try it

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Or insert spaces into the expression:

     
  
点击按钮创建及增加字符串变量。
 点击这里 
   

Run the program and try it

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Add strings and numbers

Add two numbers and return the sum of the added numbers. If a number is added to a string, a string is returned. The following example:

Example

     
  
点击按钮创建及增加字符串变量。
 点击这里 
   

Rule: If you add a number to a string, the result will be a string!

Run the program and try it

Continuing Learning Operation Symbol Example is equivalent to Result ##= += -= *= /= %=

x=y		x=5
x+=y	x=x+y	x=15
x-=y	x=x-y	x=5
x*=y	x=x*y	x=50
x/=y	x=x/y	x=2
x%=y	x=x%y	x=0