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263.Ugly-Number

263. Ugly Number

题目地址

题目描述

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

代码

public class Solution {
public boolean isUgly(long num) {
while (num % 2 == 0) {
num /= 2;
}
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while (num % 3 == 0) {
num /= 3;
}
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while (num % 5 == 0) {
num /= 5;
}
​
return num == 1;
}
​
}