Answer Posted / arunkumar mt

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n,flag=0;
clrscr();
printf("enter a number\n");
scanf("%d",&n);
for(i=2;i<=sqrt(n);i++)
{
if(n%i==0)
{
flag=1;
break;
}
}
if(flag==0)
{
printf("given number %d is prime",n);
}
else
{
printf("given number %d is not prime",n);
}
getch();
}

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