Raindrops

Welcome to Raindrops on Exercism's Python Track. If you need help running the tests or submitting your code, check out HELP.md.

Introduction

Raindrops is a slightly more complex version of the FizzBuzz challenge, a classic interview question.

Instructions

Your task is to convert a number into its corresponding raindrop sounds.

If a given number:

is divisible by 3, add "Pling" to the result.
is divisible by 5, add "Plang" to the result.
is divisible by 7, add "Plong" to the result.
is not divisible by 3, 5, or 7, the result should be the number as a string.

Examples

28 is divisible by 7, but not 3 or 5, so the result would be "Plong".
30 is divisible by 3 and 5, but not 7, so the result would be "PlingPlang".
34 is not divisible by 3, 5, or 7, so the result would be "34".

A common way to test if one number is evenly divisible by another is to compare the [remainder][remainder] or [modulus][modulo] to zero.
Most languages provide operators or functions for one (or both) of these.

[remainder]: https://exercism.org/docs/programming/operators/remainder
[modulo]: https://en.wikipedia.org/wiki/Modulo_operation

How this Exercise is Structured in Python

This exercise is best solved with Python's % (modulo) operator, which returns the remainder of positive integer division. It has a method equivalent, operator.mod() in the operator module.

Python also offers additional 'remainder' methods in the math module. math.fmod() behaves like %, but operates on floats. math.remainder() implements a "step closest to zero" algorithm for the remainder of division. While we encourage you to get familiar with these methods, neither of these will exactly match the result of %, and are not recommended for use with this exercise.

The built-in function divmod() will also give a remainder than matches % if used with two positive integers, but returns a tuple that needs to be unpacked.

Source

Contributed to by

@behrtam
@BethanyG
@bsoyka
@cmccandless
@Dog
@ikhadykin
@kytrinyx
@lowks
@N-Parsons
@pheanex
@sjakobi
@tqa236
@yawpitch

Based on

A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division. - https://en.wikipedia.org/wiki/Fizz_buzz

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