What assignment operators do JavaScript have?

The assignment operators of JavaScript are: "=", "=", "-=", "*=", "/=", "%=", "585a560ca204456310ccd7d95fba6612>=", ">>>=", "&=", "|=", "^=".

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, Dell G3 computer.

In JavaScript, the assignment operator is used to assign values ​​to variables. The operand on the left side of an assignment operator must be a variable, object property, or array element, also known as an lvalue.

For example, the following writing is wrong because the value on the left is a fixed value and operations are not allowed.

1 = 100;  //返回错误

The assignment operation has the following two forms:

• Simple assignment operation =: Directly copy the value of the operand on the right side of the equal sign to the left operand, so the value of the left operand changes.

• Assignment operation of additional operations: Before assignment, perform some operation on the right operand, and then copy the operation result to the left operand. The specific instructions are as shown in the table:

Unsigned right shift operation and assignment bita >>>= ba = a >>> b##&=##|=a |= ba = a |= b##^=The sample code is as follows:

var x = 10;
x += 20;
console.log(x);  // 输出：30
var x = 12,
    y = 7;
x -= y;
console.log(x);  // 输出：5
x = 5;
x *= 25;
console.log(x);  // 输出：125
x = 50;
x /= 10;
console.log(x);  // 输出：5
x = 100;
x %= 15;
console.log(x);  // 输出：10

Assignment operator for additional operations

Assignment operator	Explanation	Example	Equivalent to
=	Addition or concatenation operation and assignment	a = b	a = a b
-=	Subtraction operation and assignment	a -= b	a= a - b
*=	Multiplication and assignment	a *= b	a = a * b
/=	Division operation and assignment	a /= b	a = a / b
%=	Modulo operation and assignment	a %= b	a = a % b
65630b347a1052c7a251a318e990274d>=	Right shift operation and assignment	a >>= b	a = a >> b
##>>>=
Bitwise AND operation and assignment	a &= b	a = a & b
Bitwise OR operation and assignment
Bit XOR operation and assignmenta ^= b	a = a ^ b

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