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

You can do:

set b ${a}9876

or, assuming b is either set to the empty string or not defined:

append b $a 9876

The call to append is more efficient when $a is long (see append doc).