Assignment Operators
JavaScript supports the following assignment operators −
Sr.No | Operator and Description |
---|---|
1 | = (Simple Assignment )
Assigns values from the right side operand to the left side operand Ex: C = A + B will assign the value of A + B into C |
2 | += (Add and Assignment)
It adds the right operand to the left operand and assigns the result to the left operand. Ex: C += A is equivalent to C = C + A |
3 | −= (Subtract and Assignment)
It subtracts the right operand from the left operand and assigns the result to the left operand. Ex: C -= A is equivalent to C = C – A |
4 | *= (Multiply and Assignment)
It multiplies the right operand with the left operand and assigns the result to the left operand. Ex: C *= A is equivalent to C = C * A |
5 | /= (Divide and Assignment)
It divides the left operand with the right operand and assigns the result to the left operand. Ex: C /= A is equivalent to C = C / A |
6 | %= (Modules and Assignment)
It takes modulus using two operands and assigns the result to the left operand. Ex: C %= A is equivalent to C = C % A |
Note − Same logic applies to Bitwise operators so they will become like <<=, >>=, >>=, &=, |= and ^=.
Example
Try the following code to implement assignment operator in JavaScript.
<html> <body> <script type="text/javascript"> <!-- var a = 33; var b = 10; var linebreak = "<br />"; document.write("Value of a => (a = b) => "); result = (a = b); document.write(result); document.write(linebreak); document.write("Value of a => (a += b) => "); result = (a += b); document.write(result); document.write(linebreak); document.write("Value of a => (a -= b) => "); result = (a -= b); document.write(result); document.write(linebreak); document.write("Value of a => (a *= b) => "); result = (a *= b); document.write(result); document.write(linebreak); document.write("Value of a => (a /= b) => "); result = (a /= b); document.write(result); document.write(linebreak); document.write("Value of a => (a %= b) => "); result = (a %= b); document.write(result); document.write(linebreak); //--> </script> <p>Set the variables to different values and different operators and then try...</p> </body> </html>
Output
Value of a => (a = b) => 10 Value of a => (a += b) => 20 Value of a => (a -= b) => 10 Value of a => (a *= b) => 100 Value of a => (a /= b) => 10 Value of a => (a %= b) => 0 Set the variables to different values and different operators and then try...
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