PolishScript

A language where everything is in polish notation

=fib:(num n)
; =a 0
; =b 1
; =c 0
  +a*n:(num i)
  ; =c+a b
  ; =a b
    =b c
  [num]arr
[num]arr

=main:([str]arr args)
; (,(,(,10)fib)arrtostr)print
  0
num