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What are Assignment Operators in JavaScript?

Using Assignment Operators, you can assign a value to a variable. 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 the modulus using two operands and assigns the result to the left operand.
Ex: C %= A is equivalent to C = C % A

Example

Try the following code to implement assignment operator in JavaScript −

Live Demo

<html>
   <body>
      <script>
         <!--
            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>


Updated on 15-Jun-2020 05:24:34

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