// Simplest
f := fn {
    print 1
}
f() <=> true

// Simple
f2 := fn a: int {
    print a
}
f2(2) <=> true

// Return value
f3 := fn -> int {
    ret 3
}
print f3()
f3() <=> 3

// Empty function
f4 := fn {}
print f4
print f4()

// Multiple arguments
adder := fn a: int, b: int -> int {
    ret a + b
}
adder(1, 2) <=> 3

// Passing functions
h := fn {
    print "h"
    ret 1
}

g := fn f: int {
    ret f()
}

g(h) <=> 1