Exponentional Function(LONG INT)

#include <stdio.h>
int expo(int a,int b){
    int c =1;
    for(int i=1;i<=b;i++){
        c = c*a;
    }
    return c;
}
int main(){
//Long Int CODE:
long int a,b;
label:
    printf("Enter base: ");
    scanf("%ld",&a);
    printf("Enter power: ");
    scanf("%ld",&b);
    long int d = expo(a,b);
    printf("Result is %ld\n",d);
    goto label;
return 0;
}