Leetcode 263 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<=0) return false;
boolean result1 = false;
boolean result2 = false;
boolean result3 = false;
if(num ==1||num==2||num==3||num==5) return true;
if(num%2==0){
result1 = isUgly(num/2);
// System.out.println(result1);
}
if(num%3==0){
result1 = isUgly(num/3);
}
if(num%5==0){
result1 = isUgly(num/5);
}
return(result1|result2||result3);
}
}