C PROGRAM ONLY: Write a program that determines if a user entered integer is a p

Question

C PROGRAM ONLY: Write a program that determines if a user entered integer is a prime number. A prime number is an integer greater than 1 that can be divided evenly only by 1 or itself. Examples of prime numbers are: 3, 5, 7, 11 and 13. (Hint: Use a while loop and an if statement incorporating the modulo operator.) The output should look like the following with an explanation if it not a prime:

Enter an integer to be tested if a prime number: 9
The number is not prime because it is divisible by 3

Enter an integer to be tested if a prime number: 5683
The number is a prime.

Explanation / Answer

#include<stdio.h>
#include<conio.h>
void main()
{
int a , b ;
clrscr();

printf(" Enter the value of a ");
scanf("%d" , &a);

b = 2;
while( b <= a-1 )
{
if(a % b == 0)
{
printf(" Entered Number is not Prime ");
break;
}
b = b + 1;
}
if(b = a)
{
printf(" Prime Number ");
}
getch();
}

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