This chapter covers much of Tcl's basic syntax as it applies to command lines -- expressions are described in the next chapter.

Basic file I/O and the while loop are also introduced here.

2.1 The Form of a Tcl Script
2.2 Variables in Tcl
2.3 Copying a File Line by Line
2.4 While Loop
2.5 Curly Brackets
2.6 Double Quotes
2.7 Command Substitution
2.8 Opening Files
2.9 Completed File Copying Example
2.10 More about Substitution
2.11 Solutions to Exercises