3 approaches to find power of a number in java | codeyourslf

Here you can learn how we can find the power of a number in java programming language with 3 different approaches. code yourself | codeYourslf | java

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power of a number in java | codeyourslf

Here you can learn how we can find the power of a number in java programming language with 3 different approaches.

Approach:-1 "java program to find power of a number using for loop"

import java.util.Scanner;

public class usingForLoop {

    public static void main(String[] args){

      Scanner sc = new Scanner(System.in);

      System.out.println("Enter the base value: ");

      int base = sc.nextInt();

      System.out.println("Enter the exponent value: ");

      int exponent = sc.nextInt();

      

      int power = 1;

      for(int i = 1; i <= exponent; i++){

        power  = power * base;

      }

      System.out.println("The power is: "+power);

    }

}

Output

Approach:-2 "how to get power of a number using while loop"

import java.util.Scanner;

public class usingWhileLoop {

    public static void main(String[] args){

      Scanner sc = new Scanner(System.in);

      System.out.println("Enter the base value: ");

      int base = sc.nextInt();

      System.out.println("Enter the exponent value: ");

      int exponent = sc.nextInt();

      

      int power = 1;

      while(exponent != 0){

        power = power * base;

        exponent--;

      }

      System.out.println("The power is: "+power);

    }

}

Approach:-3 "find power of a number using Math.pow() method"

import java.lang.Math;

import java.util.Scanner;

public class usingMathClass {

    public static void main(String[] args){

      Scanner sc = new Scanner(System.in);

      System.out.println("Enter the base value: ");

      int base = sc.nextInt();

      System.out.println("Enter the exponent value: ");

      int exponent = sc.nextInt();

      

      System.out.println("The power is: "+Math.pow(base,exponent));

    }

}

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Code Explanation

Here I am going to explain the above 3 approaches, those are used to find out the power of a number in java.

Approach:-1

We know 2 power 3 means we have to multiply '2', 3 times i.e 2*2*2 = 8.

To code this logic we can use for loop, for the above example, the loop will go 3 times and inside that loop we have to multiply the 2 one by one.

As a result 2 will be multiplied 3 times and the results will come 8 as the power.

Approach:-2

Here the logic will remain same and only difference is the loop. We have used while loop.

Approach:-3

Here I have used Math.pow() method to find the power of a number.

- In this program we don't need to write the logic, it is already written in the java.lang.Math class, we only have to use it.

- Ex:- Math.pow(2,2) = 4.0

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