C Program to calculate sum of ODD numbers till N

Description

```Get input n and calculate the sum of odd numbers till n
Input:
5
Output:
9(1+3+5)```

Solution

```#include<stdio.h>
int main()
{
int n,i,sum=0;
printf("Enter a number:");
scanf("%d",&n);
for(i=1;i<=n;i=i+2)
{
sum=sum+i;
}
printf("The sum of first %d odd numbers: %d",n,sum);
return 0;
}```

Explanation

```Instruction(s) inside the for block{} are executed repeatedly till  the second expression (i<=n) is true.

Here i is initialized to 1 and incremented by 2 for each iteration, instructions inside the for block are executed unless i becomes greater than n. so value of i (1,3,5,...n)will be added to sum.

after adding all n odd numbers to sum, sum will be printed using printf statement.```

Author - Ramesh P Natarajan

Learner, Professor, Technology Trainer, Software Developer and Content Marketer, very much passionate in the field of Software Application Development, Machine Learning and Search Engine Optimization.

Interesting Pattern Programs: for more Patterns

```Input:
5
Output:
*
**
***
****
*****
****
***
**
*Solution```
```Input:
5
Output:
*
***
*****
*******
*********
*******
*****
***
*Solution```
```Input:
5
Output:
*        *
**      **
***    ***
****  ****
**********Solution```
```Input:
5
Output:
*       *
**     **
***   ***
**** ****
*********Solution```
```Input:
5
Output:
*       *
**     **
***   ***
**** ****
*********
**** ****
***   ***
**     **
*       *Solution```
```Input:
5
Output:
*********
*******
*****
***
*
***
*****
*******
*********Solution```