Basic Concepts in Tcl

Procedural

C-ish with caveats

Whitespace matters - especially carriage returns
Tcl treats script as a series of words
- The puts command is made up of either 2 or 3 words
  
  puts stream data
  
  puts data
  
  the command name The output stream to use The stuff to print
  
  Note that the command
```
puts stdout Print me please
```
  is wrong. Tcl would execute puts stdout Print and then try and execute the procedure me. Probably what was wanted is:
```
puts stdout "Print me please"
```

All the worlds a string

Internally everything is a string
puts stdout [expr "3.4+4.5"] prints 7.9

#	Introduces a comment to the end of the line
$	Variable dereferencing
[...]	Evaluate and replace
\	Standard C \ type stuff
"..."	Disables word and command separators
{...}	Disables nearly all special characters