Sum of Digits in C Program

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Sum of Digits in C Program

In this C program, we will code Sum of Digits of a Number in C we will allow the user to enter any number and then we will divide the number into individual digits and add those individuals (sum=sum+digit) digits using While Loop. C program to sum each digit: We can write the sum of digits program in c language by the help of loop and mathematical operation only.

Sum of digits algorithm

To get sum of each digits by c program, use the following algorithm:

•  Step 1: Get number by user
•  Step 2: Get the modulus/remainder of the number
•  Step 3: sum the remainder of the number
•  Step 4: Divide the number by 10
•  Step 5: Repeat the step 2 while number is greater than 0.

Let's see the sum of digits program in C.

Sum of Digits in C Program

For user input num

1. Initialize sum = 0
2. Extract the last digit of the number and add it to the sum (sum += num % 10)
3. Reduce the number  (num = num / 10
4. Keep doing this until num becomes 0

To get sum of each digits by c program, use   

Ex:-  number is 23145

 2 + 3 + 1 + 4 + 5 = 15

Sum of digit of a given number is 15

C Code

#include<stdio.h>  

 int main()    

{    

int a,sum=0,b;    

printf(“Enter a number:”);    

scanf(“%d”,&n);    

while(n>0)    

{    

b=a%10;    

sum=sum+b;    

a=a/10;    

}    

printf(“Sum is=%d”,sum);    

return 0;  

}   

Output