Julia Quick Note [09] Function (1) Basics

Function (1) Basics (Example of how to write)

`note09`



function sum(a, b)
    return a + b
end

◆ When return is omitted
　function sum(a, b)
　    a + b
　end

◆ One-line display
　sum(a, b) = a + b

◆ Multiple return values
　function sum(a, b)
　  x = a + b
　  y = a - b
    return (x, y)
　end

Commentary

(1) The basic format starts with function and ends with end. The value returned by the function is represented by return. (2) The return clause can be omitted. In this case, the last evaluated value will be the return value. (3) A function can be expressed in one line. In this case, the function and end clauses are unnecessary. Also, it cannot be written over multiple lines.

▼ Example of how to use the one-line display function (see the figure below) (4) Multiple return values can be returned using the tuple type. Even if the return value is 3 or more, it can be returned using tuples.

▼ Check the type of return value (plural) (example with two return values)

Julia Quick Look Note [01] How to use variables and constants Julia Quick Look Note [02] Arithmetic Expressions, Operators [Julia Quick Note [03] Complex Numbers] (https://qiita.com/ttabata/items/225c77a4d71fafc3e482) Julia Quick Look Note [04] Regular Expression [Julia quick note [05] if statement] (https://qiita.com/ttabata/items/4f0bcff1e32f60402dfb) [Julia fast-drawing note [06] loop processing] (https://qiita.com/ttabata/items/2a53825101b0b75fb589) [Julia Quick Note [07] try, catch, finally] (https://qiita.com/ttabata/items/1d6fe990526c99b65b5f) [Julia Quick Look Note [08] Variable Types (Int, Float, Bool, Char, String)] (https://qiita.com/ttabata/items/2b84a826e39bfe432b62) [Julia Quick Look Note [09] Function (1) Basics] (https://qiita.com/ttabata/items/d9b4f2728ec0dbcc6394)

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Related information

: paperclip: Julia --Official page https://julialang.org/

: paperclip: Julia --Japanese official document https://julia-doc-ja.readthedocs.io/ja/latest/index.html

: paperclip: First time Julia and installation (Windows & Linux) https://qiita.com/ttlabo/items/b05bb43d06239f968035

:paperclip: Julia - Mathematics https://docs.julialang.org/en/v1/base/math/

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