If command question

[firewine]

if u dont have any boolean expression in the command line after "if" how can i write a logic. Imean , for example

set a apple

if {$a = apple } {
puts 1
}

this command line gives an error that says : u have extra tokens at the end of expression.
any way to write it correctly?
or need any other command?

i hope i could explain ma question clearly
Thank you all..

 

[esjo]

Try:
set a apple

if {$a == "apple" } {
puts 1
}