Ugly Number

Write a program to check whether a given number is an ugly number.

Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.

Note that 1 is typically treated as an ugly number.

public class Solution {
   
    public boolean isUgly(int num) {
        if (num == 1) 
            return true; 
            
        if (num == 0)
            return false;
        //Take all factor 2 out of num 
        while(num%2 == 0) {
            num = num/2; 
        }
        //Take all factor 3 out of num 
        while (num%3 == 0) {
            num = num/3;
        }
        //Take all factor 5 out of num 
        while (num%5 == 0) {
            num = num/5; 
        }
        
        if (num == 1) {
            return true;
        } else {
            return false; 
        }
        
        
    }
}

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