eval(n)                                              Tcl Built-In Commands                                              eval(n)

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NAME
       eval - Evaluate a Tcl script

SYNOPSIS
       eval arg ?arg ...?
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DESCRIPTION
       Eval  takes  one or more arguments, which together comprise a Tcl script containing one or more commands.  Eval concate-
       nates all its arguments in the same fashion as the concat command, passes the concatenated string to the Tcl interpreter
       recursively,  and  returns  the  result  of  that evaluation (or any error generated by it).  Note that the list command
       quotes sequences of words in such a way that they are not further expanded by the eval command.

EXAMPLE
       This procedure acts in a way that is analogous to the lappend command, except it inserts  the  argument  values  at  the
       start of the list in the variable:
              proc lprepend {varName args} {
                 upvar 1 $varName var
                 # Ensure that the variable exists and contains a list
                 lappend var
                 # Now we insert all the arguments in one go
                 set var [eval [list linsert $var 0] $args]
              }

KEYWORDS
       concatenate, evaluate, script

SEE ALSO
       catch(n), concat(n), error(n), list(n), subst(n), tclvars(n)

Tcl                                                                                                                     eval(n)