Thread: ';' expected?

';' expected comes out when i compile, what's the problem with my while loop?
btw..i know this is not the best solution for making a program find out if it is a prime or not..

public class primenumberstesting2 {
	public static void main(String[]args){
		int num;
                      do{
                        }
			while(num >=0){	
			System.out.println("Enter a positive integral value: ");
			 num = Keyboard.readInt();
 
			 int isPrime=0;
 
        for(int num1=1;num1<=100;num1++)
            {
                isPrime=0;
                for(int num2=1;num2<num1;num2++) 
                    {
                        if(((num1%num2)==0) & num2!=1)
                        {
                           isPrime=1; 
                        }
                    }
                    if(isPrime==0)
                    {
                        System.out.println("Input is a prime number");
					}else
						System.out.println("Input is a non-prime number");
			}
					}
 
		}
	}

This is because you have your do while statement wrong.

This is what it should look like but you've got an extra { after the while() bit.

do {
 // statement
} while(condition);

// Json

I think you meant this:

do
{
    // statements
} while (condition);