Javascript Common Operators (Operators)-Javascript Basics Tutorial_Basic Knowledge

Javascript basic tutorial arithmetic operators

Operator

Operator Description

Example

Example

Addition

x y

运算符	运算符说明	示例	示例说明
	加法	x y	如果x为整数2,y为整数5, x y等于7 如果x为字符串"text1", y为字符串"fun", x y则等于"text1fun"
-	减法	x-y
*	乘法	x*y
/	除法	x/y
%	两者相除求余数	x%y	如果x等于10, y等于3, x%y结果等于1
	递增	x	如果x等于10, x 等于11
--	递减	y--	如果y等于10, y--等于9

If x is an integer 2 and y is an integer 5, x y is equal to 7

If x is the string "text1" and y is the string "fun",

x y is equal to "text1fun"

运算符	运算符说明	示例	示例说明
==	等于	x==y	如果x等于2, y等于2,则x==y
===	全等于(值相等,数据类型也相等)	x===y	如果x等于整数2,y为字符串"2", 则x===y不成立
>	大于	x>y
>=	大于等于	x>=y
<	小于	x
<=	小于等于	x<=y
!=	不等于	x!=y
!==	不全等于	x!==y
&&	与(and)	x < 10 && y > 1
!	非(not)	!(x==y)
||	或(or)	x==8 || y==8

-

Subtraction

x-y

*

Multiplication

x*y

/

Division

x/y

%

Divide the two and find the remainder

x%y

If x equals 10, y equals 3, the result of x%y is equal to 1

Increment

x

If x equals 10, x equals 11

--

Decreasing

y--

If y is equal to 10, y--is equal to 9

Javascript basic tutorial logical operators

Operator

Operator Description

Example

Example

==

equals

x==y

If x equals 2 and y equals 2, then x==y

===

All equal (the values ​​are equal and the data types are also equal)

x===y

运算符	运算符说明	示例	示例说明
＝	赋值	x=5	将整数5这个值赋给变量x

If x is equal to the integer 2, y is the string "2",

Then x===y is not true

>

Greater than

x>y

>=

Greater than or equal

x>=y

<

less than

x

<=

Less than or equal

x<=y

!=

not equal

x!=y

!==

Not all equal

x!==y

&&

and(and)

x < 10 && y > 1

!

Not (not)

!(x==y)

||

or(or)

x==8 || y==8

Javascript basic tutorial assignment operator Note: Please pay attention to the difference between assignment (=) and equal (==).