[Leetcode 263] Ugly Number

Source: Internet
Author: User

[Leetcode 263] Ugly Number

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

Uugly numbers are positive numbers whose prime factors only include2, 3, 5. For example,6, 8Are uugly while14Is not uugly since it has des another prime factor7.

Note that1Is typically treated as an uugly number.

Solution: according to defination, only be divided by 2, 3, 5


Public boolean isuugly (int num) {if (num <= 0) return false; while (num % 2 = 0) {num = num/2 ;} while (num % 3 = 0) {num = num/3;} while (num % 5 = 0) {num = num/5 ;} return num = 1 ;}



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