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# Ugly Number LeetCode Solution

## Problem – Ugly Number LeetCode Solution

An ugly number is a positive integer whose prime factors are limited to `2``3`, and `5`.

Given an integer `n`, return `true` if `n` is an ugly number.

Example 1:

``````Input: n = 6
Output: true
Explanation: 6 = 2 × 3
``````

Example 2:

``````Input: n = 1
Output: true
Explanation: 1 has no prime factors, therefore all of its prime factors are limited to 2, 3, and 5.
``````

Example 3:

``````Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes the prime factor 7.
``````

Constraints:

• `-231 <= n <= 231 - 1`

## Ugly Number LeetCode Solution in C++

``````for (int i=2; i<6 && num; i++)
while (num % i == 0)
num /= i;
return num == 1;
``````

## Ugly Number LeetCode Solution in Python

``````for p in 2, 3, 5:
while num % p == 0 < num:
num /= p
return num == 1
``````

## Ugly Number LeetCode Solution in Java

``````for (int i=2; i<6 && num>0; i++)
while (num % i == 0)
num /= i;
return num == 1;
``````
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