In this tutorial, we will discuss a concept of C program to compute the sum of digits in a given numbers
In C programming language, we can use for loop ,while loop and do-while loop to compute the sum of digits in a given numbers
In this article, we are going to learn how to find the sum of digits in a given number in C language
Program 1
#include <stdio.h>
#include <stdlib.h>
int main()
{
long num,count,digits,sum=0;
printf("Enter a number\n");
scanf("%ld",&num);
for(count=num; num>0; num/=10)
{
digits=num%10;
sum=sum+digits;
}
printf("Given number is: %ld\n",count);
printf("\nSum of the digits %ld is = %ld\n",count,sum);
getch();
return 0;
}
When the above code is executed, it produces the following results
Csae 1
Enter a number for find digits sum 111100 Given number is:111100 Sum of the digits 111100 is = 4
Csae 2
Enter a number for find digits sum 12345 Given number is:12345 Sum of the digits 12345 is = 15
Program 2
#include <stdio.h>
#include <stdlib.h>
int main()
{
long num,count,digits,sum=0;
printf("Enter a number for find sum of digits\n");
scanf("%ld",&num);
count=num;;
while( num>0)
{
digits=num%10;
sum=sum+digits;
num/=10;
}
printf("Given number is: %ld\n",count);
printf("\nSum of the digits %ld is = %ld\n",count,sum);
getch();
return 0;
}
When the above code is executed, it produces the following results
Case 1
Enter a number for find sum of digits 1030 Given number is:1030 Sum of the digits 1030 is = 4
Case 2
Enter a number for find digits sum 56789 Given number is:56789 Sum of the digits 56789 is = 35
Program 3
#include <stdio.h>
#include <stdlib.h>
int main()
{
long num,count,digits,sum=0;
printf("Enter the number for find sum of digits\n");
scanf("%ld",&num);
count=num;;
do{
digits=num%10;
sum=sum+digits;
num/=10;
}while( num>0);
printf("Given number is: %ld\n",count);
printf("\nSum of the digits %ld is = %ld\n",count,sum);
getch();
return 0;
}
When the above code is executed, it produces the following results
Case 1
Enter a number for find sum of digits 11111 Given number is:11111 Sum of the digits 11111 is = 5
Case 2
Enter a number for find digits sum 76543 Given number is:76543 Sum of the digits 76543 is = 25
Methods
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