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 concatenates 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(3tcl), concat(3tcl), error(3tcl), list(3tcl), subst(3tcl), tclvars(3tcl)