Answer Posted / karthik

#include<stdio.h>
#include<conio.h>
void main()
{
int n,c=0,i;
clrscr();
printf("enter any number");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
if(n%i==0)
c++;
}
(c==2)? printf("%d is a prime number",n):
printf("%d is not a prime number",n);
getch();
}

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