This program will give you an idea of adding a series having
only odd numbers. Let a series
1+3+5+7+……..25. Now Define the first odd number by a variable and last
odd number by another variable. Then use a while loop for performing sum
operation. Here I used variable i as loop counter as well as putting each odd
number of the series on it. While loop will stop when i>lastODDnumber
//1+3+5+..............+n
#include <stdio.h>
main(){
int i,n1,n2,SUM=0;
printf("Insert the first
ODD number: ");
scanf("%d",&n1);
printf("Insert the last
ODD number: ");
scanf("%d",&n2);
i=n1; //initialize i by first
odd number
while(i<=n2){
SUM=i+SUM;
i=i+2;
}
printf("Total:
%d",SUM);
return 0;
}