Write a program to find the sum of first n odd numbers

#include<stdio.h>

#include<conio.h>

void main()

{

int n,i=1,sum=0;

clrscr();

printf("Enter the number: ");

scanf("%d",&n);

do

{

sum=sum+i;

i=i+2;

}while(i<=n);

printf("Sum=%d",sum);

getch();

}

Output:

Enter the number: 10

Sum=25