#include <stdio.h>
/* C Prrogram to print ODD numbers from 1 to N Using While loop*/
int main()
{
//declare variable c as counter
int c;
/*declare variable n to store limit */
int n;
/* assign initial value
to counter c from where we want to print the numbers */
c=1;
//accept the value for n
printf("Enter the value of N: ");
scanf("%d",&n);
printf("Odd Numbers from 1 to %d:\n",n);
/* while loop, that will print numbers */
while(c<=n)
{
/* the condition to check ODD number */
if(c%2 != 0)
printf(" %d ",c);
/* increasing loop counter by 1 */
c++;
}
return 0;
}
Output:
Enter Value of N
7
Odd Numbers from 1 to 7
1 3 4 7

1. Write a program in C to print Odd numbers from 1 to N using do while loop.

#include <stdio.h>
/* C Prrogram to print ODD numbers from 1 to N Using do While loop*/
int main()
{
/* declare variable c as counter */
int c;
/* declare variable n to store limit */
int n;
/*assign initial value
to counter c from where we want to print the numbers */
c=1;
//accept the value for n
printf("Enter the value of N: ");
scanf("%d",&n);
printf("Odd Numbers from 1 to %d:\n",n);
/*while loop, that will print numbers*/

do
{
/*the condition to check ODD number */
if(c%2 != 0)
printf(" %d ",c);
/* increasing loop counter by 1 */
c++;
}while(c<=n);
return 0;
}
Output: Enter Value of N
7
Odd Numbers from 1 to 7
1 3 4 7
Program Explanation:
1.In the program given above there are two variables declared
1.)n to store the limit and
2)variable c=1 is assigned as loop counter.
2. printf("Enter the value of N: ");
display message "Enter the value of N:"
7
"We enter the value 7"
scanf("%d",&n); Read the value entered by user and store it in n.
next printf() display message "Odd Numbers from 1 to 7"
3. control jumps in do while loop start executing condition c%2!=0 (1%2!=0) which is true and display 1.
value of c is increment by 1 and after then while(c<=n) condition(2<=7) is evaluated which is true and body of do while loop is executed.
Then the condition if(c%2!=0) is tested which is false , value of c incremented (c++)by 1 now becomes c=3 .
Next while(c<=n) condition is tested(3<=7) which is true again body of loop executes , this process continues while value of c<=7.
Control jumps out of loop as soos as value of c becomes 8 and stops the program.