C Exercises: Calculate x raised to the power n

C Programming Mathematics: Exercise-4 with Solution

Write a C program to calculate x raised to the power n (xⁿ).

Example:
Input:
x = 7.0
n = 2

x = 6.2
n = 3
Output:
Result:(x^n) : 49.000000
Result:(x^n) : 238.328000

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
#include <limits.h>

double powxn(double x, int n) {
    double k;
    if (n == 0) return 1;
    k = powxn(x * x, n / 2);
    if (n % 2) k = k * x;
    return k;
}

int main(void)
{
    double x = 7.0;
    int n = 2;
    printf("\nx = %f, y = %d  ", x, n);
    printf("\nResult:(x^n) : %f ",powxn(x, n));
    x = 6.2;
    n = 3;
    printf("\n\nx = %f, y = %d  ", x, n);
    printf("\nResult:(x^n) : %f ",powxn(x, n));
    return 0;
}

Sample Output:

x = 7.000000, y = 2  
Result:(x^n) : 49.000000 

x = 6.200000, y = 3  
Result:(x^n) : 238.328000 

Flowchart:

C Programming Code Editor:

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