C program to find that given number is prime or not.

#include<stdio.h>

#include<conio.h>

void main(){

int n,i;

clrscr();

printf("Enter a Positive Integer\n");

scanf("%d",&n);

if(n==1) 

printf("%d is Universal Prime Number\n",n);

else{

for(i=2; i<=n-1; i++){

if(n%i==0) break;

}

if(n==i) printf("%d is Prime Number\n",n);

else printf("%d is Not Prime Number\n",n);

}

getch();

}