[incr Tcl] for Windows

A free Tcl object-oriented extension

Incr Tcl, commonly stylised as [incr Tcl], is an OO (object-oriented) system for the Tcl language. The language was introduced in 1993 and has experienced tremendous growth in the Tcl community. The incr Tcl language is a play on the C++ language and offers the additional language support required to build large Tcl/Tk applications.

You can download itcl on your Windows device for free. Before you download, ensure that your device runs Windows 7, Windows 8, Windows 8.1 or Windows 10.  If you know C++, then this extension should be familiar to you, or you can use Dev C++.

This language establishes the idea of objects acts as building blocks for applications. Additionally, the implementation can work well as a standalone language with its interpreter. It can also be used as a package that a Tcl application can load.

In TCL, you can assign a variable using the command set; a dollar sign is used to get the value of a variable. The value of a variable is usually stored as strings.

How do you set a value in Tcl?

How do you write a loop in Tcl?

A loop is a repetition control structure that lets you write code, which can be executed a specific number of times. The syntax of a for loop is:

for {initialization} {condition} {increment} {   statement(s);}

You need to understand the flow of the control to be able to use it. The initialisation step will be executed first, and only occur once. You can’t include a statement here. The program will then evaluate the condition and if it’s true, the body of the code will be executed. If it’s not true, the code won’t run and the flow control will jump to the following statement after the loop. 

If the condition is true and the body executes, then the loop will go back to the increment step. This statement lets you update the loop control variables, and then the loop will evaluate the condition again. The process continues until the condition is false, then the loop terminates. 

What is ‘proc’ in Tcl?

‘Proc’ is one of the Tcl in-built commands that lets you create a new Tcl procedure called ‘name’. It’ll replace any existing method with that name. When you call the command, the Tcl interpreter will execute the contents within the body. 

A relatively easy to use Tcl extension

Itcl is one of the most popular object-oriented systems for Tcl. The language is relatively easy to use, and it lets you offer an object model, including private and public classes, variables and multiple inheritances.