**Tcl Tutorial Index**

***Getting started***

[%|%Tcl0.html|Introduction%|%]
[%|%Tcl0a.html|Running Tcl%|%]
[%|%Tcl1.html|Simple Text Output%|%]
[%|%Tcl2.html|Assigning values to variables%|%]
[%|%Tcl3.html|Evaluation and Substitutions 1: Grouping arguments with ""%|%]
[%|%Tcl4.html|Evaluation and Substitutions 2: Grouping arguments with {}|%]
[%|%Tcl5.html|Evaluation and Substitutions 3: Grouping arguments with []%|%]
[%|%Tcl6.html|Results of a command - Math 101%|%]
[%|%Tcl6a.html|Computers and Numbers%|%]
***Flow Control***
[%|%Tcl7.html|Numeric Comparisons 101 - if%|%]

[%|%Tcl8.html|Textual Comparison - switch%|%]
[%|%Tcl9.html|Looping 101 - While loop%|%]
[%|%Tcl10.html|Looping 102 - For and incr%|%]
[%|%Tcl11.html|Adding new commands to Tcl - proc%|%]
[%|%Tcl12.html|Variations in proc arguments and return values%|%]
[%|%Tcl13.html|Variable scope - global and upvar%|%]

***Data Types***
[%|%Tcl14.html|Tcl Data Structures 101 - The list%|%]
[%|%Tcl15.html|Adding and Deleting members of a list%|%]
[%|%Tcl16.html|More list commands - lsearch, lsort, lrange%|%]
[%|%Tcl16a.html|Simple pattern matching - "globbing"%|%]
[%|%Tcl17.html|String Subcommands - length index range%|%]
[%|%Tcl18.html|String comparisons - compare match first last wordend%|%]
[%|%Tcl19.html|Modifying Strings - tolower, toupper, trim, format%|%]
[%|%Tcl20.html|Regular Expressions 101%|%]
[%|%Tcl20a.html|More Examples Of Regular Expressions%|%]
[%|%Tcl21.html|More Quoting Hell - Regular Expressions 102%|%]
[%|%Tcl22.html|Associative Arrays%|%]
[%|%Tcl23.html|More On Arrays - Iterating and use in procedures%|%]
[%|%Tcl23a.html|Dictionaries%|%]

***Input and Output***
[%|%Tcl24.html|File Access 101%|%]
[%|%Tcl25.html|Information about Files - file, glob%|%]
[%|%Tcl26.html|Invoking Subprocesses from Tcl - exec, open%|%]

***Introspection***
[%|%Tcl27.html|Learning the existence of commands and variables - info%|%]
[%|%Tcl28.html|State of the interpreter - info%|%]
[%|%Tcl29.html|Information about procs - info%|%]

***Modularization and Code Reuse***
[%|%Tcl30.html|Modularization - source%|%]
[%|%Tcl31.html|Building reusable libraries - packages and namespaces%|%]

***Further Topics***
[%|%Tcl32.html|Creating Commands - eval%|%]
[%|%Tcl33.html|More command construction - format, list%|%]
[%|%Tcl34.html|Substitution without evaluation - format, subst%|%]
[%|%Tcl35.html|Changing Working Directory - cd, pwd%|%]
[%|%Tcl36.html|Debugging and Errors - errorInfo errorCode catch error return%|%]
[%|%Tcl37.html|More Debugging - trace%|%]
[%|%Tcl38.html|Command line arguments and environment strings%|%]
[%|%Tcl39.html|Leftovers - time, unset%|%]
[%|%Tcl40.html|Channel I/O: socket, fileevent, vwait%|%]
[%|%Tcl41.html|Time and Date - clock%|%]
[%|%Tcl42.html|More channel I/O - fblocked and fconfigure%|%]
[%|%Tcl43.html|Child interpreters%|%]