Answer Posted / kiran kumar maharana

#include<iostream.h>
#include<conio.h>
int prime(int);
void main()
{
int n;
cout<<"enter a no.";
cin>>n;
int x;
x=prime(n);
if(x==1)
cout<<"prime";

else
cout<<"not a prime no.";

}
int prime(int n)
{
int i,count=0;
if(n<2)
{
return 0;
}
else
{for(i=2;i<n;i++)

{
if(n%i==0)
{
count++;
}
}
if(count>=1)
{

return 0;

}
else
return 1;}

}

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