What is = in javascript

"=" is an assignment operator in JavaScript, used to assign the value of the expression on the right to the variable or attribute on the left, for example "name = "nch""; similar assignment operators are also "=", "-=", "*=", "/=", "%=", etc.

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

javascript assignment operator "="

Assignment expressions use operators such as = to assign values ​​to variables or properties. In this expression, the left operand is required to be a variable or attribute, and the right operand can be any value of any type. The value of the entire expression is equal to the value of the right operand. The function of the assignment operator is to store the value of the right operand in the left operand. According to whether other operations need to be performed before assignment, assignment operators can be divided into simple assignment operators and compound assignment operators.

Commonly used assignment operators:

##%= Use the value of the variable or attribute on the left side of the operator to the value of the expression on the right side Take the modulus and assign the result to the variable or attribute on the left

Operator	Description	Example
=	Assign the value of the expression on the right to the variable or attribute on the left	name = "nch"
=	Assign the value of the variable or attribute on the left side of the operator plus the value of the expression on the right side to the variable or attribute on the left side	a = b // Equivalent In: a = a b
-=	Subtract the value of the variable or attribute on the left side of the operator from the value of the expression on the right and assign it to the variable on the left Or attribute	a -= b //Equivalent to: a = a-b
*=	Place the left side of the operator The value of the variable or attribute multiplied by the value of the expression on the right is assigned to the variable or attribute on the left	a *= b //Equivalent to: a = a*b
/=	Divide the value of the variable or attribute on the left side of the operator by the value of the expression on the right side and assign it to the variable or attribute on the left side	a / = b //Equivalent to: a = a/b
		a %= b //Equivalent to: a = a%b

Example: Use of assignment operator

var x = 16,y = 8,z = 3;  //各个变量使用简单赋值运算符“=”赋值
var temp = x*y;  //将右边表达式的值赋给变量
console.log("x = 16, y = 8, z = 3");
console.log("x /= 2的值为:", x /= 2);//使用复合赋值运算符/=
console.log("y %= 3的值为:", y %= 3); //使用复合赋值运算符%=
console.log("z *= 2的值为:", z *= 2); //使用复合赋值运算符*=
console.log("temp = x*y的值为:", x * y);

Run result:

##Extended information:

JavaScript assignment operator

Operator=## =x = yx = x y-=x -= yx = x - y*=x *= yx = x * yx /= y##%=x %= yx = x % yx x = x x = x >> y##>>> =x >>>= yx = x >>> y##^=x ^= yx = x ^ y|=x |= yx = x | y* *=x **= yx = x ** yjavascript advanced tutorial

Example	is equivalent to
x = y	x = y
		##/=
x = x / y
## >>=	x >>= y
##&=	x &= y	x = x & y
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