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.
1 is typically treated as an ugly number.
public static boolean isUgly(int num) {
if (num <= 0)
return false;
while (num >= 2 && num % 2 == 0)
num /= 2;
while (num >= 3 && num % 3 == 0)
num /= 3;
while (num >= 5 && num % 5 == 0)
num /= 5;
if (num == 1)
return true;
return false;
}版权声明：本文为博主原创文章，未经博主允许不得转载。
原文地址：http://blog.csdn.net/shangqing1123/article/details/47835799
