C Program To Find Power Of A Number

Posted by Rakesh 7th July 2021

//Program using While Loop

#include <stdio.h>

int main()
{
         int base, exxp, poow, i;
    
         printf("Enter base value : ");
         scanf("%d", &base);

         printf("Enter power value : ");
         scanf("%d", &exxp);
    
         poow = 1;
         i = 1;
         while(i <= exxp)
         {
               poow=poow*base;
               i++;
         }
    
        printf("%d Power %d is: %d ", base, exxp, poow);
    
        return 0;
}

Output:

Enter base value : 2

Enter power value : 3

2 Power 3 is: 8 

Code Analysis

Power of a number is calculated by multiplying the number by itself, the number of times it is multiplied is decided by its power value.

For example 23 power 2 will be calculated by multiplying 23 two times i.e., 23*23.

//Program using for loop

#include <stdio.h>

int main()
{
         int base, exxp, poow, i;
    
         printf("Enter base value : ");
         scanf("%d", &base);
    
         printf("Enter power value : ");
         scanf("%d", &exxp);
    
         poow = 1;
         for(i=1; i<=exxp; i++)
        {
              poow = poow *base;
        }
    
        printf("%d Power %d is: %d ", base, exxp, poow);
    
        return 0;
}

Output:

Enter base value : 23

Enter power value : 3

23 Power 3 is: 12167 

Code Analysis
This code calculates the power of a number using a for loop.

//Program using Pow function


<span style="font-weight: 400;">#include &lt;stdio.h&gt;</span>

<span style="font-weight: 400;">#include&lt;math.h&gt;</span>

&nbsp;

<span style="font-weight: 400;">int main()</span>

<span style="font-weight: 400;">{</span>

<span style="font-weight: 400;">         int base,poow,res;</span>

<span style="font-weight: 400;">    </span>

<span style="font-weight: 400;">         printf("Enter the base  ");</span>

<span style="font-weight: 400;">         scanf("%d", &amp;base);</span>

<span style="font-weight: 400;">    </span>

<span style="font-weight: 400;">         printf("Enter the power ");</span>

<span style="font-weight: 400;">         scanf("%d", &amp;poow);</span>

<span style="font-weight: 400;">    </span>

<span style="font-weight: 400;">         res=pow(base,poow);</span>

<span style="font-weight: 400;">    </span>

<span style="font-weight: 400;">         printf("%d Power %d is: %d ", base, poow, res);</span>

<span style="font-weight: 400;">         return 0;</span>

<span style="font-weight: 400;">}</span>


Output:

Enter the base  2

Enter the power 3

2 Power 3 is: 8 

Code Analysis
This code use header file . “math.h” has an inbuilt function 

pow(base,exponent)

base is the number which is multiplied by itself,  the number of times it is multiplied depends on its exponent value.