Elm Elm

Function Guarantees

This course has been updated! We now recommend you take the Introduction to Elm, v2 course.

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The "Function Guarantees" Lesson is part of the full, Elm course featured in this preview video. Here's what you'd learn in this lesson:

Functions in Elm are pure. If you give functions the same arguments they will always return the same value. It’s impossible for Elm to have a function that generates a random number. To get a random number from Elm you must use a command.

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