Editing Turing (programming language) (section)

==Syntax==
Turing is designed to have a very lightweight, readable, intuitive [[Syntax (programming languages)|syntax]]. Here is the entire [["Hello, World!" program]] in Turing with [[syntax highlighting]]:

 '''put''' <span style="color:red">"Hello World!"</span>

Turing avoids [[semicolon]]s and [[Curly brackets|braces]], using explicit end markers for most language constructs instead, and allows [[Declaration (computer programming)|declarations]] anywhere. Here is a complete program defining and using the traditional [[Recursion|recursive]] function to calculate a [[factorial]].

  <span style="color:green">[[Comment (computer programming)|%]] Accepts a number and calculates its factorial</span>
  
  '''function''' <span style="color:blue">factorial</span> (<span style="color:blue">n</span>: '''int''') : '''real'''
       '''if''' <span style="color:blue">n</span> = 0 '''then'''
            '''result''' 1
       '''else'''
            '''result''' <span style="color:blue">n</span> * <span style="color:blue">factorial</span> (<span style="color:blue">n</span> - 1)
       '''end if'''
  '''end''' <span style="color:blue">factorial</span>
  
  '''var''' <span style="color:blue">n</span>: '''int'''
  '''loop'''
       '''put''' <span style="color:red">"Please input an integer: "</span> ..
       '''get''' <span style="color:blue">n</span>
       '''exit when''' <span style="color:blue">n</span> >= 0
       '''put''' <span style="color:red">"Input must be a non-negative integer."</span>
  '''end loop'''
  
  '''put''' <span style="color:red">"The factorial of "</span>, <span style="color:blue">n</span>, <span style="color:red">" is "</span>, <span style="color:blue">factorial</span> (<span style="color:blue">n</span>)