JavaScript Math.pow() Method

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The JavaScript Math.pow() method is used to calculate the power of a base number raised to an exponent. This method takes two arguments: the base (the number we want to raise) and the exponent (the power to which we want to raise the base).

Following are the cases, where this method returns "NaN" as result −

  • If the exponent is NaN.
  • If the base is NaN and exponent is not 0.
  • If the base is 1 and exponent is Infinity.
  • If the base < 0 and exponent is not an integer.
  • If either or both the arguments are non-numeric.

Note: This methos is equivalent to the ** operator.

Syntax

Following is the syntax of JavaScript Math.pow() method −

Math.pow(base, exponent);

Parameters

This method accepts two parameters. The same is described below −

  • base: The base number.
  • exponent: The exponent to which the base is raised.

Return value

This method returns the value of x to the power of y (xy).

Example 1

In the following example, we are using the JavaScript Math.pow() method with postive and negative integer arguments −

<html>
<body>
<script>
   let value1 = Math.pow(5, 3);
   document.write(value1, "<br>");

   let value2 = Math.pow(-5, -3);
   document.write(value2);
</script>
</body>
</html>

Output

If we execute the program, it returns 125 and -0.008 as result for the provided numbers.

Example 2

Here, we are using the Math.pow() method by passing zero arguments −

<html>
<body>
<script>
   let value1 = Math.pow(5, 0);
   document.write(value1, "<br>");

   let value2 = Math.pow(0, 5);
   document.write(value2, "<br>");

   let value3 = Math.pow(0, -5);
   document.write(value3, "<br>");

   let value4 = Math.pow(-5, 0);
   document.write(value4);
</script>
</body>
</html>

Output

If we execute the program, it returns 1, 0, Infinty, and 1 as result for the provided numbers.

Example 3

In this example, we are passing floating point numbers as arguments −

<html>
<body>
<script>
   let value1 = Math.pow(5.2, 3.3);
   document.write(value1, "<br>");
</script>
</body>
</html>

Output

If we execute the program, it returns "230.57437175697558" as result for the provided numbers.

Example 4

Following are the cases where Math.pow() mehtod returns "NaN" as result −

<html>
<body>
<script>
   //exponent is NaN
   let value1 = Math.pow(5, NaN);
   document.write(value1, "<br>");

   //base is NaN and exponent is not 0
   let value2 = Math.pow(NaN, 3);
   document.write(value2, "<br>");

   //base is 1 and exponent is Infinity
   let value3 = Math.pow(1, Infinity);
   document.write(value3, "<br>");
   let value4 = Math.pow(-1, -Infinity);
   document.write(value4, "<br>");

   //base < 0 and exponent is not an integer
   let value5 = Math.pow(-2, 0.5);
   document.write(value5, "<br>");

   //pow() with non-numeric string
   let value6 = Math.pow("Peter", "Parker");
   document.write(value6, "<br>");
   let value7 = Math.pow("Peter", 1);
   document.write(value7, "<br>");
   let value8 = Math.pow(1, "Parker");
   document.write(value8);
</script>
</body>
</html>

Output

If we execute the above program, it returns "NaN" for all the cases.

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