Write a C program to repeatedly sum the digits of a number until a single-digit number remains (Digital Root).
A single integer N.
Print the single-digit digital root.
0 <= N <= 1000000000
38
2
3 + 8 = 11, then 1 + 1 = 2.
#include <stdio.h>
int main() {
long long n;
if (scanf("%lld", &n) == 1) {
// Write your code here
}
return 0;
}Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used