## INDEX

### FIND SUM OF DIGITS OF A NUMBER USING RECURSION USING C PROGRAM

Sum of digits in c using recursion

#include<stdio.h>
int main(){
int num,x;
clrscr();
printf("\nEnter a number: ");
scanf("%d",&num);
x=findsum(num);
printf("Sum of the digits of %d is: %d",num,x);
return 0;
}

int r,s;
int findsum(int n){
if(n){
r=n%10;
s=s+r;
findsum(n/10);
}
else
return s;
}

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Unknown said...

write a program to add the following
¼+2/4+3/4+5/3+6/3+………

CProgrammer said...

You should declare function int findsum(int) and line 18 (else) shouldn't be included, because the output is incorrect...here is the right source code:

#include
int findsum(int);
int main(){
int num,x;

printf("\nEnter a number: ");
scanf("%d",&num);
x=findsum(num);
printf("Sum of the digits of %d is: %d",num, x);
return 0;
}

int r, s;
int findsum(int n){

if(n){
r=n%10;
s=s+r;
findsum(n/10);
}
return s;
} Anonymous said...

s should be initialized with 0

dgdinkar said...
This comment has been removed by the author.
dgdinkar said...

No need as it is global so already initialized with 0. Anonymous said...

initialize with zero Anonymous said...

ya u r right... Anonymous said...

The variable s treats as a external variable.the default value of s is automatically initialized to 0. Anonymous said...

what's the meaning of if (n) ?? Anonymous said...

how will you find the sum of the digits of the resulting sum of digits if it is more than 10?

Gokulnath N said...

int sum = 0;
if (num < 10)
return num;
else
{
sum = num % 10;
num = num / 10;
num = num + sum;