sum of digits of a number using recursion function c code example
Example 1: Sum of digits of a number using recursion function c
#include <stdio.h>
int sum (int a);
int main()
{
int num, result;
printf("Enter the number: ");
scanf("%d", &num);
result = sum(num);
printf("Sum of digits in %d is %d\n", num, result);
return 0;
}
int sum (int num)
{
if (num != 0)
{
return (num % 10 + sum (num / 10));
}
else
{
return 0;
}
}
Example 2: prime number c program
int isPrime(int n) {
for (int i = 2; i < n; i++) if (n % i == 0) return 0;
return 1;
}