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What is Power function in Java? – Know its uses

Published on Aug 21,2019 2.2K Views
A tech enthusiast in Java, Image Processing, Cloud Computing, Hadoop. A tech enthusiast in Java, Image Processing, Cloud Computing, Hadoop.
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Power function in Java is used to calculate a number raised to the power of some other number. This function accepts two parameters and returns the value of the first parameter raised to the second parameter. In this article, I will tell you the use of a power function.

Below topics are covered in this article:

Let’s get started!

Introduction to Power function in Java

Java Pow() - Power Function in Java - EdurekaPower function in Java is of type java.lang.Math.pow() library. It is mainly used to return the value of the first argument raised to the power of the second argument. It works similar to the exponents that we use in our mathematics.

Syntax:

double pow(double base, double exponent)
  • base − Any primitive data type.
  • exponent − Any primitive data type

Return: This method returns baseexponent.

  • If the second argument is positive or negative zero, this method will return 1.0.
  • If the second argument is not a number (NaN), this method will return NaN.
  • If the second argument is 1, this method will return the result same as the first argument.

With this, now let’s move further and look the various ways of using pow() with the help of below examples.

Examples of Power Function

Example 1: Demonstrates the working of java.lang.Math.pow() method.

import java.lang.Math;
public class Example1 {
public static void main(String args[]) {
double x = 60;
double y = 3;
System.out.println(Math.pow(x, y));
x = 3;
y = 4;
System.out.println(Math.pow(x, y));
x = 2;
y = 5;
System.out.println(Math.pow(x, y));
}
}

Output:

216000
81
32

Example 2:

public class Example2 {
public static void main(String[] args) {
double a = 18.0;
double b = -3;
//return (18) power of -3
System.out.println(Math.pow(a, b));
}
}

Output:

1.7146776406035665294924554183813e-4

Example 3:

public class Example3 {
public static void main(String[] args) {
double a = -107;
double b = 0.6;
//returns NaN
System.out.println(Math.pow(a, b));
}
}

Output: 

NaN

With this, we come to an end of this article on Power Function in Java. I hope you found it informative and understood the various uses of pow() method. If you wish to learn fundamentals of Java in depth, kindly check other blogs on Java.

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