Answer Posted / alex r.

// without loop
// for digit in DEC
#include <stdio.h>
int sum(int digit)
{
if (digit%10 != digit)
return digit%10 + sum(digit/10);
return digit;
}
int main(void)
{
int digit = 25634;
printf("\nSum:%d", sum(digit));
return 0;
}

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