Write a C function boolean isPrime (int n), that would take a positive integer n as...

Write a C function boolean isPrime (int n), that would take a positive integer n as a parameter and return true or false whether the number is a prime number. You should check the range of n and print proper message (For example, if n is a genitive number, you should print out an error message).

Expert Solution

#include <stdio.h>
#define bool int
#define true 1
#define false 0

bool isPrime(int number)
{
int flag = true;
for(int i=2;i<=number/2;i++)
{
if(number%i == 0) // divisible by any number between 2 to number -1
flag = false;

}
return flag;
}
int main(void) {

   int num;

   printf("Enter the number to be checked if its prime : ");
   scanf("%d",&num);
   if(num < 0)

   printf("\nError : The entered number is negative ");
   if(num == 1 || num ==2 || num ==3)
   printf("Error : ");

   else if(isPrime(num) == true)
   printf("\nNumber %d is prime",num);
   else
   printf("\nNumber %d is not prime",num);

   return 0;
}

Output:

Enter the number to be checked if its prime : 
Number 13 is prime

Do ask if any doubt. Please upvote.

venereology answered 4 months ago

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