What are the javascript operators?-Front-end Q&A-php.cn

Operators include: 1. Arithmetic operators, including " ", "-", "*", etc.; 2. Assignment operators, including "=", "=", "-=", etc.; 3. , Comparison operators, including "==", "===", etc.; 4. Logical operators, including "&&", "||", etc.; 5. Bit operators, including "&", "|", etc. .

What are the javascript operators?

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript operator (operator)

In JavaScript, operators are used to assign values, compare values, perform arithmetic operations, etc.

Arithmetic operators

Arithmetic operators are used to perform operations on two variables or values.

Assign y = 5, the following table will explain to you the use of arithmetic operators:

##%remainder x = y % 2y = 5x = 1incrementx = yy = 6x = 6x = y y = 6#x = 5--decrementx = --yy = 4x = 4x = y--y = 4x = 5

Operator	Description	Example	y value	x value
	Addition	x = y 2	y = 5	#x = 7
-	Subtraction	x = y - 2	y = 5	#x = 3
*	Multiplication	x = y * 2	y = 5	#x = 10
/	Division	x = y / 2	y = 5	x = 2.5

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:

OperatorExampleInstancex Value=x = yx = yx = 5 =x = yx = x y#x = 15-=x -= yx = x - yx = 5 *=x *= yx = x * yx = 50/=x /= yx = x / yx = 2%=x %= y x = x % yx = 0

##String operators

operator, = operator can be used to concatenate strings.

Given text1 = "Good ", text2 = "Morning", and text3 = "", the following table explains the use of string operators:

Operator =

Example	text1	#text2	text3
text3 = text1 text2	"Good "	"Morning"	"Good Morning"
text1 = text2	"Good Morning"	"Morning"	""

Comparison operators

Comparison operators are used to judge logical statements to determine whether two given values or variables are equal.

Given x=5, the following table shows the use of comparison operators:

Operator==x == 5===x === 5!=!==x ! == 5##> is greater than x > 8false< is less than x < 8truegreater than or equal toless than Or equal to true

Description

Comparison

The result

is equal to

x == 8

false

true

The value and type are equal (constantly equal to )

x === "5"

false

true

is not equal to

x != 8

true

The value and type are not equal (not equal)

x !== "5"

true

false

##> =

x>= 8

false

x <= 8

Conditional operator

The conditional operator is used for assignment operations based on conditions.

Given x=6 and y=3, the following table demonstrates the operation of the conditional operator:

Syntax	Example
Variable= (Condition) ? Value 1:Value 2	voteable = (age < 18) ? "Too young to": "Age enough";

Logical operator

Logical operators are used to determine the logical relationship between variables or values.

Given x=6 and y=3, the following example demonstrates the use of logical operators:

Operator	Description	Example
&&	and	(x < 10 && y > 1) are true
\|\|	or	(x == 5 \|\| y == 5) is false
!	Not	!(x == y) is true

##Bitwise operator

Bit operators work on 32-bit numbers. Any numeric operations will be converted to 32 bits. The result is converted to a JavaScript number.

OperatorDescriptionExampleSimilar toResultdecimal&ANDx = 5 & 10101 & 00010001 1|ORx = 5 | 10101 | 00010101 5~ Negation#x = ~ 5 ~0101 1010 -6^XORx = 5 ^ 10101 ^ 00010100 4##<<##>> Shift rightx = 5 >> 10101 >> 100102[Related recommendations: javascript learning tutorial






Move left	x = 5 << 1	0101 << 1	1010	10

]

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