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The ireallyreallywanna operator

In Tcl, any character (yes - any character) can appear in a variable name, though making use of variable names that contain - for example - spaces adds a needless complexity to your coding. Groups of special characters can be protected from the Tcl interpreter by wrapping them in curly braces, and individual characters protected by preceding them with a backslash character. That's a more general rule - it applies not only to variable names, but also to any single parameter string.

You could say that { } and \ are the "ireallywanna" operators ... in the same way that you can say that [ ] is the "choose me first" operator and that $ is the "contents of" operator.

(written 2005-06-28, updated 2008-06-07)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
T202 - Tcl/Tk - Tcl Fundamentals
  [4453] Tcl variable names - no real limits! - (2015-03-10)
  [4324] Learning to program - variables and constants - (2014-11-22)
  [3917] BODMAS - the order a computer evaluates arithmetic expressions - (2012-11-09)
  [2442] Variable storage - Perl, Tcl and Python compared - (2009-10-08)
  [1469] Curley brackets v double quotes - Tcl, Tk, Expect - (2007-12-12)
  [1426] Buffering up in Tcl - the empty coke can comparison - (2007-11-10)
  [1282] Stringing together Tcl scripts - (2007-07-29)
  [1136] Buffering output - why it is done and issues raised in Tcl, Perl, Python and PHP - (2007-04-06)
  [782] Converting between Hex and Decimal in Tcl - (2006-06-28)
  [349] Comments in Tcl - (2005-06-16)
  [328] Making programs easy for any user to start - (2005-05-29)
  [210] Joining lists in Tcl. Indirect variables in Tcl. - (2005-02-12)
  [3] Looking for a donkey - (2004-08-05)


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