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What are basic JavaScript mathematical operators?

The basic mathematical operators in JavaScript include the following −

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

Let’s see how Arithmetic operators work and what does it include −

Sr.No
Operator and Description
1

+ (Addition)
Adds two operands
Ex: A + B will give 30
2

- (Subtraction)
Subtracts the second operand from the first
Ex: A - B will give -10
3

* (Multiplication)
Multiply both operands
Ex: A * B will give 200
4

/ (Division)
Divide the numerator by the denominator
Ex: B / A will give 2
5

% (Modulus)
Outputs the remainder of an integer division
Ex: B % A will give 0
6

++ (Increment)
Increases an integer value by one
Ex: A++ will give 11
7


-- (Decrement)
Decreases an integer value by one
Ex: A-- will give 9

Example

You can try to run the following code to learn how to work Arithmetic Operators in JavaScript −

<html>
   <body>
      <script>
         var a = 77;
         var b = 30;
         var c = "Demo";
         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 + c = ");
         result = a + b + c;
         document.write(result);
         document.write(linebreak);
         
         a = ++a;
         document.write("++a = ");
         result = ++a;
         document.write(result);
         document.write(linebreak);

         b = --b;
         document.write("--b = ");
         result = --b;
         document.write(result);
         document.write(linebreak);
      </script>
   </body>
</html>
Updated on 19-Jun-2020 08:25:40

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