Functions

A function groups a sequence of statements under a reusable name. You declare it with fonction (Python: def) and return a result with retourner (Python: return). The body is delimited by indentation.

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fonction additionner(a, b):
    retourner a + b

resultat = additionner(3, 4)
afficher(resultat)

A function that never runs retourner returns nul (Python: None). You can also return several values separated by commas.

Default parameters

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fonction saluer(nom, politesse="Bonjour"):
    retourner politesse + " " + nom

afficher(saluer("Aminata"))
afficher(saluer("Kofi", "Salut"))

Bonjour Aminata Salut Kofi

Functions are first-class values: you can store one in a variable, pass it as an argument, or return it from another function — exactly like in Python.

See the full reference