Ugly Number

题目描述：

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.

这个题非常简单，直接上代码：

public class Solution {
public boolean isUgly(int num) {
if(num<1)
return false;
while(num!=1){
if(num%2==0){
num/=2;continue;
}
if(num%3==0){
num/=3;continue;
}
if(num%5==0){
num/=5;continue;
}
return false;
}
return true;
}
}