/**
I left the original programmer's comments in. I am having trouble understanding how this set of loops works. Both i and j start out as being initialized to 2, so...when the following statement executes:

if(i%j == 0) {
continue OuterLoop;
}

if both values for i and j are 2 then the condition of the if statement would be true and the continue statement would execute, thus not passing 2 to the output. Right??? But program output shows different. So...I am missing something. PLEASE HELP. Thank you.

*/


public class Primes2 {
public static void main(String[] args) {
int nValues = 50; // The maximum value to be checked

// Check all values from 2 to nValues
OuterLoop:
for(int i = 2 ; i <= nValues ; ++i) {
// Try dividing by all integers from 2 to i-1
for(int j = 2 ; j < i ; ++j) {
if(i%j == 0) { // This is true if j divides exactly
continue OuterLoop; // so exit the loop
}
}
// We only get here if we have a prime
System.out.println(i); // so output the value
}
}
}

/**
The output is the following:

2
3
5
7
11
13
17
19
23
29
31
37
41
43
47
*/

Man, your inner loop condition j<i is not correct. Because first time, both j and i are 2 making the condition (2<2) false, so it will come out of loop with nothing inside the loop being executed. It will go to System.out.println(i) directly and execute.

it spits out all the prime numbers between 2 and 50...so...

check with j<=i instead of j<i

the program compiles just fine but no values whatsoever are outputted