TCL : Concatenate a variable and a string

Question

Assume we have a variable \'a\' set to 12345 :

set a 12345

Now how do i set a new variable \'b\' which contains the value of \'a\' and anot

Answer 1

I don't get what you mean the direct string... I'm not sure if you want... However, if you want the value of 12349876 you can do:

% set b [concat $a$u]
12349876

If you want $a or $u to be part of the string, just add a backslash '\' before the desired variable.

Answer 2

set myString "Hello"

append myString " World!"

puts "$myString"

Hello World!

Answer 3

Or，you can use format

set b [format %s%s $a $u]

Answer 4

other option is to use set command. since set a gives value of a we can use it to set value of b like below

set b [set a]9876

Answer 5

From Tcl 8.6.2 onwards, there is string cat which can be used to solve this problem.

set b [string cat $a 9876]

Answer 6

Other option is to use concat command like below.

set b [concat $a\9876]