Check For Prime No

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 //Check For Prime  
 //Downloaded from www.c4cprog.co.nr  
 #include<conio.h>  
 void main()  
 {  
 int n,i,p=0;  
 clrscr();  
 printf("Enter No :");  
 scanf("%d",&n);  
 if(n==1)  
 printf("\n Neither Prime Nor Composite");  
 else  
 {  
 for(i=2;i<=n/2;i++)  
 {  
 if((n%i)==0)  
 p++;  
 }  
 if(p==0)  
 printf("\n\n\t\tNO. IS PRIME");  
 if(p!=0)  
 printf("\n\n\t\tNO. IS NOT PRIME");  
 }  
 getch();  
 }