Java program to find power of a number using pow function













Basic Java programming exercises

Java Tutorial Java Exercises Data Structures


Write a Java program to input two numbers from user and find their power using pow() function. How to find power of a number in Java programming. How to use pow() function in Java programming.








Required knowledge

Arithmetic operators, Data types, Basic input/output


Program to find power of a number
Java program to find power of any number (Using Standard Method)
/**
 * Java program to find power of any number (Using Standard Method)
 */

import java.util.Scanner;

class Test
{
  public static void main(String arg[]) 
  {
    int n,p,result=1;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextInt();
    System.out.print("Enter exponent: ");
    p=op.nextInt();
 
    if(n>=0&&p==0)
     {
        result=1;
     }
    else if(n==0&&p>=1)
      { 
         result=0;
      }
    else
     {
         for(int i=1;i<=p;i++)
  {
            result=result*n;
   }     
     }
    System.out.println(n+"^"+p+"="+result);
 
  }
}




Output:

Enter base: 3
Enter exponent: 2
3^2=9

Java program to find power of any number (Using For Loop)

/**
 * Java program to find power of any number (Using For Loop)
 */

import java.util.Scanner;

class Test
{
  public static void main(String arg[]) 
  {
    int n,p,r=1;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextInt();
    System.out.print("Enter exponent: ");
    p=op.nextInt();
 
      if(n>=0&&p==0)
       {   
          r =1;
       }
       else if(n==0&&p>=1)
 {   
            r=0;
 } 
       else
 { 
              for(int i=1;i<=p;i++)
        { 
                   r=r *n;
    }    
    }    
 
       System.out.println(n+"^"+p+"="+r);
 
    }
 
}




Output:

Enter base: 10
Enter exponent: 3
10^3=1000

Java program to find power of any number (Using Command Line Arguments)


/**
 * Java program to find power of any number (Using Command Line Arguments)
 */

import java.util.Scanner;

class Test
{
  public static void main(String arg[]) 
  {
    int n,p,r=1;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextInt();
    System.out.print("Enter exponent: ");
    p=op.nextInt();
 
      if(n>=0&&p==0)
   {
     r =1;
   }
   else if(n==0&&p>=1)
   {
    r=0;
   }
    else
    {
       for(int i=1;i<=p;i++)
       {
            r=r *n;
        }
     }
 
    System.out.println(n+"^"+p+"="+r);
}
}




Output:

Enter base: 5
Enter exponent: 3
5^3=125


Java program to find power of any number (Using Function)


/**
 * Java program to find power of any number (Using Function)
 */

import java.util.Scanner;

class Test
{
  public static void main(String arg[]) 
  {
    long n,p,r=1;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextLong();
    System.out.print("Enter exponent: ");
    p=op.nextLong();

    r=Test.calpower(n,p);
 
     System.out.println(n+"^"+p+"="+r);
 
  }
 
  static long calpower(long n1,long p1)
  {
 
     long r1=1;
 
     if(n1>=0&&p1==0)
     
        r1 =1;
 
     else if(n1==0&&p1>=1)
 
        r1=0;
     else
 
       for(int i=1;i<=p1;i++)
       
         r1=r1 *n1;
 
     return r1;
 
    }
 
}



Output:

Enter base: 7
Enter exponent: 3
7^3=343



Java program to find power of any number (Using Class)


/**
 * Java program to find power of any number (Using Class)
 */

import java.util.Scanner;

class Pow
{
   long r1=1;
 
   Pow(long n1,long p1)
  {
 
    if(n1>=0&&p1==0)
    r1 =1;
    else if(n1==0&&p1>=1)
    r1=0;
    else
      for(int i=1;i<=p1;i++)
        r1=r1 *n1;
  }
}



class Test
{
  public static void main(String arg[]) 
  {
    long n,p,r=1;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextLong();
    System.out.print("Enter exponent: ");
    p=op.nextLong();

    Pow k=new Pow(n,p);
 
   System.out.println(n+"^"+p+"="+k.r1);
 
   }
}




Output:

Enter base: 5
Enter exponent: 5
5^5=3125



Java program to find power of any number (Using Recursion)


/**
 * Java program to find power of any number (Using Recursion)
 */

import java.util.Scanner;

class Test
{
  static long r=1;
  public static void main(String arg[]) 
  {
    long n,p;
    Scanner op=new Scanner(System.in);
    System.out.print("Enter base: ");
    n=op.nextLong();
    System.out.print("Enter exponent: ");
    p=op.nextLong();
    Test.pow(n,p);
 
      System.out.println(n+"^"+p+"="+r);
   }
 
 static void  pow(long n,long p)
 {
 
    if(p<=0)
    {
       return;
    }
     else if(n==0 && p>=1)
    { 
       r=0;
       return;
    }
    else
       r=r*n;
 
    Test.pow(n,p-1);
}
 
}



Output:

Enter base: 2
Enter exponent: 5
2^5=32









Java Programming