SIMPLE SOLUTIONS

APPEND(3TCL) - Linux man page online | Library functions

Append to variable.

Chapter
append(3tcl) Tcl Built-In Commands append(3tcl) _________________________________________________________________________________________________

NAME

append - Append to variable

SYNOPSIS

append varName ?value value value ...? _________________________________________________________________________________________________

DESCRIPTION

Append all of the value arguments to the current value of variable varName. If varName does not exist, it is given a value equal to the concatenation of all the value arguments. The result of this command is the new value stored in variable varName. This command pro‐ vides an efficient way to build up long variables incrementally. For example, “append a $b” is much more efficient than “set a $a$b” if $a is long.

EXAMPLE

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

SEE ALSO

concat(3tcl), lappend(3tcl)

KEYWORDS

append, variable
Tcl append(3tcl)
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append(3tcl) referred by concat(3tcl) | dict(3tcl)
refer to concat(3tcl) | lappend(3tcl)
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