Any number is input through the keyboard. Write a program to determine whether the number is a prime or not.

#include<stdio.h> #include<math.h> int main()    {    int   i, n, isprime;    printf( "Enter a positive integer number: " );    scanf( "%d" ,&n);    if(n<2)         isprime=0;    else        for(i=2;i<sqrt(n);i++)            {               isprime=1;               if(n%i==0)                  {                      isprime=0;                      break;                  }         }     if(isprime==1)         printf( "\nPRIME NUMBER" );     else          printf( "\nNOT PRIME NUMBER" );     return 0;    }