Thread: Have trouble dealing with negative numbers.

I am doing a primesum program. The aim of this program is to find the sum of prime integers. I have a problem here dealing with negative numbers. What should I add inside my code to ignore negative inputs? Anyone can help me?

Here is my code below. It is doing something but it does not ignore my negative inputs.

public class primesum
{
public static int checkPrime(int entry)
{
int x = entry; //Initial sum of the primes
int count = 1; //The modulus factor
while(count <= Math.sqrt(entry))
{
if(entry % count != 0)
{
count++; //Do the next modulus factor
}
else
{
x = 0;
break;
}
}

return x; //Adds all the sum up and returns the total sum
}
public static void main(String[] args)
{
int x = 0;
BufferedReader bR = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter some 32-bit integers: ");
int entry = 1;
try{
while(entry != 0){
String line = bR.readLine();
entry = Integer.parseInt(line);
x += checkPrime(entry); //Checks whether x is a prime
}
}
catch(Exception ex){
System.out.println(ex);
}
System.out.println("The sum of the primes is " + x);

}

}

Ok sorry, just trying to help here.
I edited the post completely. That topic should be better accesible. I did not know it existed.
I normally like to have the answer and then work backwards to figure out myself how it works. More fun for me . But i did not know this forum rather goes the teaching way. My bad.

I am trying to make the program ignore negative inputs to it. (So, when the user enters a negative number before a zero termination, the final output for the total sum of primes should not have negative numbers added to them.) This means the program only terminates when the user types in 0 with an enter key.

Well, you can use an

if(statement)

to check if the number is smaller then 0, and thus being negative. Then you could ignore negative numbers. And you could also check if the number is equal to 0.

if(number==0)