I've no idea why someone thought this page might be useful... RS thinks that in some page [string compare ...] was written with single brackets, which open a potential new page if somebody clicks on the blue brackets. But now that we have this page, comparing strings can be done in various ways:
if {$name=="foo"} {...} ;# (1)
if {$name eq "foo} {...} ;# (2)
if {[string compare $name foo]==0} {...} ;# (3)
if {[string equal $name foo]} {...} ;# (4)(1) is the classic overloading of comparison operators in expr to work also on non-numeric strings, but first tries numeric, including the various number bases, so
8 == 010 0xF == 15 == 017
(2) is new string comparison operators from 8.4 or so
(3) used to be recommended, but is so wordy...
(4) is recommended since 8.3 or so