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What are JavaScript Operators

Let us take a simple expression “10 + 20 is equal to 30”. Here 10 and 20 are called operands and ‘+’ is called the operator. JavaScript supports the following types of operators.

  • Arithmetic Operators
  • Comparison Operators
  • Logical (or Relational) Operators
  • Assignment Operators
  • Conditional (or ternary) Operators

Let’s have a look at Comparison Operators −

JavaScript supports the following comparison operators. Assume variable A holds 10 and variable B holds 20 −

Sr.No Operator and Description
1

= = (Equal)

Checks if the value of two operands are equal or not, if yes, then the condition becomes true.

Ex: (A == B) is not true.
2

!= (Not Equal)

Checks if the value of two operands are equal or not, if the values are not equal, then the condition becomes true.

Ex:(A != B) is true.
3

> (Greater than)

Checks if the value of the left operand is greater than the value of the right operand, if yes, then the condition becomes true.

Ex: (A > B) is not true.
4

< (Less than)

Checks if the value of the left operand is less than the value of the right operand, if yes, then the condition becomes true.

Ex: (A < B) is true.
5

>= (Greater than or Equal to)

Checks if the value of the left operand is greater than or equal to the value of the right operand, if yes, then the condition becomes true.

Ex: (A >= B) is not true.
6

<= (Less than or Equal to)

Checks if the value of the left operand is less than or equal to the value of the right operand, if yes, then the condition becomes true.

Ex: (A <= B) is true.

The following code shows how to use comparison operators in JavaScript

Example

Live Demo 
<html>
   <body>
      <script>
         var a = 10;
         var b = 20;
         var linebreak = "<br />";
    
         document.write("(a == b) => ");
         result = (a == b);
         document.write(result);
         document.write(linebreak);

         document.write("(a < b) => ");
         result = (a < b);
         document.write(result);
         document.write(linebreak);
          
         document.write("(a > b) => ");
         result = (a > b);
         document.write(result);
         document.write(linebreak);

         document.write("(a != b) => ");
         result = (a != b);
         document.write(result);
         document.write(linebreak);

         document.write("(a >= b) => ");
         result = (a >= b);
         document.write(result);
         document.write(linebreak);

         document.write("(a <= b) => ");
         result = (a <= b);
         document.write(result);
         document.write(linebreak);
      </script>
      
   </body>
</html>