1append(n)                    Tcl Built-In Commands                   append(n)
2
3
4
5______________________________________________________________________________
6

NAME

8       append - Append to variable
9

SYNOPSIS

11       append varName ?value value value ...?
12______________________________________________________________________________
13

DESCRIPTION

15       Append all of the value arguments to the current value of variable var‐
16       Name.  If varName does not exist, it is given a value equal to the con‐
17       catenation  of  all the value arguments.  The result of this command is
18       the new value stored in variable varName.   This  command  provides  an
19       efficient  way  to build up long variables incrementally.  For example,
20       “append a $b” is much more efficient than “set a $a$b” if $a is long.
21

EXAMPLE

23       Building a string of comma-separated numbers piecemeal using a loop.
24
25              set var 0
26              for {set i 1} {$i<=10} {incr i} {
27                  append var "," $i
28              }
29              puts $var
30              # Prints 0,1,2,3,4,5,6,7,8,9,10
31

SEE ALSO

33       concat(n), lappend(n)
34

KEYWORDS

36       append, variable
37
38
39
40Tcl                                                                  append(n)