APL syntax

APL's core syntactic principles are:
 * Arrays as first class citizens
 * Functions take arrays as argument(s) and produce arrays as result
 * Functions have long right scope
 * Operators take functions and/or arrays as operand(s) and produce derived functions
 * Operators have long left scope

Example array definitions
 simplenumvec←1 2 3 4 ⍝ A simple numeric vector simplecharvec←'ABCD' ⍝ A simple character vector

Example function definition
 ∇ r←l Tradfn r              [1]    ⍝ An infix (dyadic) tradfn [2]   r←l r                         ∇

Example operator definition
 ∇ r←larg(Main OVER PreProc)rarg [1]   r←(PreProc larg)Main(PreProc rarg) ∇

Example function application
 ÷3        ⍝ Prefix primitive function 0.3333333333     1+2        ⍝ Infix primitive function 3     +/1 2 3 4  ⍝ Prefix primitive derived function 10     2+/1 2 3 4 ⍝ Infix primitive derived function 3 5 7