Java Math pow()

class Main {
  public static void main(String[] args) {

    // computes 5 raised to the power 3
    System.out.println(Math.pow(5, 3));


  }
}

// Output: 125.0

Syntax of Math.pow()

That is, pow(a, b) = ab

The syntax of the pow() method is:

Math.pow(double num1, double num2)

Here, pow() is a static method. Hence, we are accessing the method using the class name, Math.

pow() Parameters

The pow() method takes two parameters.

• num1 - the base parameter
• num2 - the exponent parameter

pow() Return Values

• returns the result of num1^num2
• returns 1.0 if num2 is zero
• returns 0.0 if num1 is zero

Note: There are various special cases for the pow() method. To learn about all the special cases, visit Java Math.pow() Special Cases (Official Java Documentation).

Example: Java Math pow()

class Main {
  public static void main(String[] args) {

    // create a double variable
    double num1 = 5.0;
    double num2 = 3.0;

    // Math.pow() with positive numbers
    System.out.println(Math.pow(num1, num2));  // 125.0


    // Math.pow() with zero
    double zero = 0.0;
    System.out.println(Math.pow(num1, zero));    // 0.0
    System.out.println(Math.pow(zero, num2));    // 1.0


    // Math.pow() with infinity
    double infinity = Double.POSITIVE_INFINITY;
    System.out.println(Math.pow(num1, infinity));  // Infinity
    System.out.println(Math.pow(infinity, num2));  // Infinity


    // Math.pow() with negative numbers
    System.out.println(Math.pow(-num1, -num2));    // 0.008

  }
}

In the above example, we have used the Math.pow() with positive numbers, negative numbers, zero, and infinity.

Here, Double.POSITIVE_INFINITY is used to implement positive infinity in the program.

int a = 2;
int b = 5;

Math.pow(a, b);   // returns 32.0

Also Read:

• Java Math.cbrt()
• Java Math.sqrt()