C Program for Sum the digits of a given number
Given a number, find sum of its digits.
Example :
Input : n = 687
Output : 21
Input : n = 12
Output : 3
1. Iterative:
C
# include<stdio.h>
int getSum( int n)
{
int sum = 0;
while (n != 0)
{
sum = sum + n % 10;
n = n/10;
}
return sum;
}
int main()
{
int n = 687;
printf ( " %d " , getSum(n));
return 0;
}
|
Time Complexity: O(log10n)
Auxiliary Space: O(1)
How to compute in single line?
c
# include<stdio.h>
int getSum( int n)
{
int sum;
for (sum=0; n > 0; sum+=n%10,n/=10);
return sum;
}
int main()
{
int n = 687;
printf ( " %d " , getSum(n));
return 0;
}
|
2. Recursive
c
int sumDigits( int no)
{
return no == 0 ? 0 : no%10 + sumDigits(no/10) ;
}
int main( void )
{
printf ( "%d" , sumDigits(687));
return 0;
}
|
Please refer complete article on Program for Sum the digits of a given number for more details!
Last Updated :
04 Aug, 2022
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...