C program uses recursion to calculate the power of a number

Comprehensive Collection of C Programming Examples

In this example, you will learn to use recursion to calculate the power of a number.

To understand this example, you should understand the followingC programming languageTopic:

• C function

• C user-defined function

• C recursion

Program uses recursion to calculate power

#include <stdio.h>
int power(int n1, int n2);
int main() {
　　　　int base, a, result;
　　　　printf("Enter base: ");
　　　　scanf("%d", &base);
　　　　printf("Enter exponent (positive integer): ");
　　　　scanf("%d", &a);
　　　　result = power(base, a);
　　　　printf("%d^%d = %d", base, a, result);
　　　　return 0;
}
int power(int base, int a) {
　　　　if (a != 0)
　　　　　　　　return (base　*　power(base, a)　-　1));
　　　　else
　　　　　　　　return　1;
}

Output Result

Enter the base:　3
Enter the exponent (positive integer):　4
3^4　=　81

You can also 　 Calculate the power of a number using a loop.

If you need to calculate the power of a number raised to a decimal value, you can usepow() LibraryFunction.

Comprehensive Collection of C Programming Examples