how do u compute x^Y without using math function code example

Example 1: Write a Program to find exponential without using pow() method

#include <stdio.h>
int main() {
    int base, exp;
    long long result = 1;
    printf("Enter a base number: ");
    scanf("%d", &base);
    printf("Enter an exponent: ");
    scanf("%d", &exp);

    while (exp != 0) {
        result *= base;
        --exp;
    }
    printf("Answer = %lld", result);
    return 0;
}

Example 2: creating modulu function withou using % java

public static int mod(int x1, int x2) {
        // this is a function only.
  		// don't forget the class!!!
        int d = x1 / x2  - 1;
        int result = x1 - (d * x2);

	    return result;
	}