C Exercises: Display the sum of n number of odd natural number

C For Loop: Exercise-8 with Solution

Write a C program to display the n terms of odd natural numbers and their sum.
like: 1 3 5 7 ... n

Pictorial Presentation:

Display the sum of n number of odd natural number

Sample Solution:

C Code:

#include <stdio.h>
void main()
   int i,n,sum=0;

   printf("Input number of terms : ");
   printf("\nThe odd numbers are :");
     printf("%d ",2*i-1);
   printf("\nThe Sum of odd Natural Number upto %d terms : %d \n",n,sum);

Sample Output:

Input number of terms : 10                                                                                    
The odd numbers are :1 3 5 7 9 11 13 15 17 19                                                                 
The Sum of odd Natural Number upto 10 terms : 100 


for (i = 1; i <= n; i++) {
  printf("%d ", 2 * i - 1);
  sum += 2 * i - 1;

In the said loop, the variable i is initialized to 1, and the loop will continue as long as i is less than or equal to the value of variable 'n'. In each iteration of the loop, the printf function will print the value of (2*i-1) to the console, followed by a space character.

Additionally, the value of (2*i-1) will be added to the variable 'sum' in each iteration of the loop.

The loop will increment the value of i by 1, and the process will repeat until the condition i<=n is no longer true.


Flowchart: Display the sum of n number of odd natural number

C Programming Code Editor:

Improve this sample solution and post your code through Disqus.

Previous: Write a program in C to display the multiplication table vertically from 1 to n.
Next: Write a program in C to display the pattern like right angle triangle using an asterisk

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

Follow us on Facebook and Twitter for latest update.

C Programming: Tips of the Day

How to get the current directory in a C program?

Have you had a look at getcwd()?

char *getcwd(char *buf, size_t size);
Simple example:

char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
printf("Current working dir: %s\n", cwd);
   } else {
       perror("getcwd() error");

Ref : https://bit.ly/3w9CoMS


We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook