Sum of digit of an integer

Problem Statement
Write a c Program to find out sum of digit of an integer by iterative method
#include<stdio.h>
int main() {
  int n,sum,x;
  printf("enter the number \n");
  scanf("%d",&n);
  sum=0;
  while(n>=1)  {  
    x=n%10;
    sum=sum+x;
    n=n/10;
  }
  printf ("the sum of digits is %d\n",sum);
  return 0;
}

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