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See also Mythryl tutorial, more on functions

Intro ∞

Functions allow for reusable code and are are extremely important for reducing your code's complexity. Use them often!

The basics ∞

fun greet()
    =
    printf "Hello, world!\n";

greet();
greet();
# =>
# Hello, world!
# Hello, world!

Passing a string to a function ∞

fun greet( string )
    =
    printf "%s" string;

greet( "Hello, world!\n" );
greet( "Fine day, isn't it!\n" );
# =>
# Hello, world!
# Fine day, isn't it!

You can use printf in the usual manners:

fun greet( string )
    =
    printf "Hello, %s!\n" string;

greet( "world" );
# =>
# Hello, world!

Functions returning data ∞

fun memory()
    =
    "I can never remember this long phrase!\n";

printf "%s" ( memory() );
# =>
# I can never remember this long phrase!

Remember that when "doing stuff" for a printf you must use parentheses. So memory() has parentheses surrounding it. The extra spaces improve readability. Here it is again:

fun memory()
    =
    "I can never remember this long phrase!\n";

printf "%s" ( memory() );
# =>
# I can never remember this long phrase!

You can also name a value with a function's result.

fun memory()
    =
    "I can never remember this long phrase!\n";

a = memory();
printf "%s" a;
# =>
# I can never remember this long phrase!