Julia·Julia essentials

Functions and dispatch

Functions are defined with function or short syntax, and multiple dispatch selects a method by argument types.

Beginner 10 min read Lesson 4 of 150 Challenge included
What you will be able to do
  • Define f(x) = x + 1.
  • Dispatch on argument types.
  • Use multiple return values with tuples.

In plain English

Functions are defined with function or short syntax, and multiple dispatch selects a method by argument types.

  • Define f(x) = x + 1.
  • Dispatch on argument types.
  • Use multiple return values with tuples.
functions.jlJULIA
area(w, h) = w * h

classify(x::Int) = "integer"
classify(x::AbstractFloat) = "float"

println(area(3, 4), " ", classify(1.5))
Your turn

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Answer from memory: What does multiple dispatch choose?

TEXT · starter
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What does multiple dispatch choose?

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