Conditional Statement Issue *Newbie Help*

I'm trying a basic challenge that involves a program counting to 100, and displaying that output while it counts up.

• For every multiple of 3; it must print Fizz
• For every multiple of 5, it must print Buzz
• For every multiple of 3 & 5 it must print FizzBuzz

The code I've written handles System.out on the non-multiple numbers, and the FizzBuzz multiples without issue. However, for the multiples of just 3 and 5 it acts as if I didn't write any "else if" condition. I have been unable to figure out what might be causing this! Here is the code.

Code :

---

class prog{
	public static void main(String args[]){
 
	int num = 0;
 
	while (age < 100){
	num++;
 
	if (num % 3 != 0 || num % 5 != 0){
		System.out.println(num);
	}
	else if (num % 3 == 0 && num % 5 != 0){
		System.out.println("Fizz");
	}
	else if (num % 5 == 0 && num % 3 != 0){
		System.out.println("Buzz");
	}
	else if (num % 5 == 0 && num % 3 == 0){
		System.out.println("FizzBuzz");
	}
 
	}
 
 
	}
}

---

Which line(s) are printing in error or not printing as expected?

These two blocks

else if (num % 3 == 0 && num % 5 != 0){
System.out.println("Fizz");
}
else if (num % 5 == 0 && num % 3 != 0){
System.out.println("Buzz");

It's as if I never even wrote the code in.

Ex.
1,2,3,4,5 .... 13,14,FizzBuzz

When I'm trying to get 1,2,Fizz,4,Buzz....

Your issue is your first statement. Check your logic:
1. if num is not a multiple of 3 OR if num is not a multiple of 5
2. if num is a multiple of 3 AND if num is not a multiple of 5

Right there is the start of your problem. Your second condition requires num to NOT be a multiple of 5. However, if num is not a multiple of 5, the first if statement's condition is met, so the else statements are never even checked.
This same logistical problem is in your other conditions.

Here's the error:

Code :

---

if (num % 3 != 0 || num % 5 != 0) {
                System.out.println(num);
            }

---

It must be

Code :

---

if (num % 3 != 0 && num % 5 != 0) {
                System.out.println(num);
            }

---

You see, this condition goes before your "Fizz" and "Buzz" conditions. But "Fizz" is executed only if num % 5 != 0. And if this condition is true, than the erroneous block's condition holds (that is, num % 3 != 0 || num % 5 != 0). The same thing is for the "Buzz" block.

With chains of if/else if statements, the first one that is true will be executed. NONE of the others will be tested.
If the first if statement is true none of the other if statements will be tested.

Does this post mean that the first if is true for numbers 1 to 14:

Quote:

---

1,2,3,4,5 .... 13,14,FizzBuzz

---

Look at the conditions in the first if and see when it will be false. Right now it is true for numbers 1 thru 14

That makes perfect sense. I can't believe I didn't pick up on that at all. Thanks!