263. Ugly Number - Easy
Problem:
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.
Solutions:
public class Solution {
public boolean isUgly(int num) {
if (num == 0) {
return false;
}
while (num != 1) {
if (num % 2 == 0) {
num = num / 2;
continue;
}
if (num % 3 == 0) {
num = num / 3;
continue;
}
if (num % 5 == 0) {
num = num / 5;
continue;
}
return false;
}
return true;
}
}