JavaScript Assignment Operators

Assignment Operators in JavaScript

Assignment operators in JavaScript are used to assign values to variables. They not only assign values but can also perform mathematical operations while assigning. This guide will walk you through the various assignment operators, explaining how each one works with clear examples.

= Operator in JavaScript

The = operator assigns the value of the right-hand operand to the left-hand variable.

Example:

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let x = 20;  // Assigns 20 to x
let y = x + 10;  // Assigns 30 to y (20 + 10)
console.log(x);  // Output: 20
console.log(y);  // Output: 30

+= Operator in JavaScript

The += operator adds the right-hand operand to the left-hand variable and assigns the result to the left-hand variable.

Example:

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let a = 15;
a += 10;  // Equivalent to a = a + 10
console.log(a);  // Output: 25

String Example:

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let text = "Hello";
text += " JavaScript!";
console.log(text);  // Output: Hello JavaScript!

-= Operator in JavaScript

The -= operator subtracts the right-hand operand from the left-hand variable and assigns the result to the left-hand variable.

Example:

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let b = 20;
b -= 5;  // Equivalent to b = b - 5
console.log(b);  // Output: 15

*= Operator in JavaScript

The *= operator multiplies the left-hand variable by the right-hand operand and assigns the result to the left-hand variable.

Example:

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let c = 4;
c *= 5;  // Equivalent to c = c * 5
console.log(c);  // Output: 20

**= Operator in JavaScript

The **= operator raises the left-hand variable to the power of the right-hand operand and assigns the result to the left-hand variable.

Example:

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let d = 3;
d **= 3;  // Equivalent to d = d ** 3 (3 to the power of 3)
console.log(d);  // Output: 27

/= Operator in JavaScript

The /= operator divides the left-hand variable by the right-hand operand and assigns the result to the left-hand variable.

Example:

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let e = 50;
e /= 5;  // Equivalent to e = e / 5
console.log(e);  // Output: 10

%= Operator in JavaScript

The %= operator calculates the remainder of the division of the left-hand variable by the right-hand operand and assigns it to the left-hand variable.

Example:

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let f = 29;
f %= 6;  // Equivalent to f = f % 6 (remainder of 29 divided by 6)
console.log(f);  // Output: 5