Answer Posted / rabindra nath das

#include<stdio.h>
#include<conio.h>
void main()
int n,k,fl=0,r;
clrscr();
printf("\n Enter the number==>>");
scanf("%d",&d);
for(k=2;k<=n/2 && fl==0;k++)
{
r=n%k;
if(r==0);
fl=1;
}
if(fl==0)
printf("\n %d is a prime number",n);
else
printf("\n %d is not prime number",n);
getch();
}

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