Explain this C Code: Calculate Sun of 5 digits

@gsk-ssit-KY7Fvw • Oct 26, 2024

Oct 26, 2024

1.3K

/* To calculate sum of five digits*/
int num,a,n;
int sum=0;
system("cls");
printf("Enter a five digit number\n");
scanf("%d",&num);
a=num%10;
n=num/10;
sum=sum+a;
a=n%10;
n=n/10;
sum=sum+a;
a=n%10;
n=n/10;
sum=sum+a;
a=n%10;
n=n/10;
sum=sum+a;
a=n%10;
sum=sum+a;
printf("The sum of the five digits of %d is %d\n",num,sum);

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Kaustubh Katdare

@thebigk • Jan 28, 2013

Which part of the above do you find difficult to understand? I think it is the part where it says -

a= num%10;
n= num/10;

Am I right?

First part of understanding the code would be to understand what the % operator does.

0
Anoop Kumar

@anoop-kumar-GDGRCn • Jan 28, 2013
Check this out simpler program:
```
int num,sum=0;
printf("Enter a number\n");
scanf("%d",&num);
 
while(num >0){
         
            sum=sum+num%10;
            num=num/10;
         
        }
 
printf("The sum of the digits of %d is    %d\n",num,sum);
```
It will return you sum of any digit number.
% operator is also called as modulo, That means it will return the reminder of operation.
ps: I wrote this program in java. I hope it good in syntax wise for C.

0
Jeffrey Arulraj

@jeffrey-xA7lUP • Jan 30, 2013

It does not find sum of 5 numbers But it finds the sum of the digits of a five digit number

0
ashwin sarangula

@ashwin-sarangula-Eb5r0N • Jan 30, 2013

it would be good if we use for loop in this program

0