The function `isUgly` classifies a number as an ugly number, which are defined as positive integers with only 2, 3, and 5 as prime factors. This classification is beneficial for optimization problems in computational theory.
Through a combination of a `for` loop and a nested `while` loop, the code reduces the number by continuously dividing it by primes 2, 3, and 5, determining its 'ugliness' based on the result.
After dividing by all applicable primes, if the result equals 1, it indicates that the original number `n` was formed solely from the ugly number factors of 2, 3, and 5.
The implementation in Scala effectively showcases how collections and loop structures can be utilized efficiently to solve a complex mathematical problem succinctly.
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