Answer Posted / rajan maheshwari

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int a,c=0,i=2;
cout<<"Enter A Number = ";
cin>>a;
while(i<=a/2)
{
if(a%i==0)
{c=0;
break;}
else
{i++;
c=1;
}}
if(c==1||a==2||a==3)
cout<<"\nPrime Number";
else
if(a==1)
cout<<"\nNeither Prime Nor Composite";
else
cout<<"\nNot a Prime Number";
getch();
}

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