Write a C program to find sum of all odd numbers between 1 to n using while loop

//Write a C program to find sum of all odd numbers between 1 to n.

#include "stdio.h"

int main (){

int num,i,sum;

printf ("Enter the value of number :\n");

scanf ("%i",&num);

i=1;

while(i<=num){

sum=sum+i;

i=i+2;

}

printf ("The sum of all odd numbers between 1 to n is %i",sum);

return 0;

}

output  output       output     output 

 Enter the value of number :

10

The sum of all odd numbers between 1 to n is 25