The first step, similar to writing a bash script, is to tell the script what it's executing under. For expect we use the following:

#!/usr/bin/expect
``

### Variables

Variables are very simple, just use `set {name} {value}`, for example:

set a "apple" set b "banana" set c "cantalope"

Referencing variables is done by simply appending `$` to the name - so `$a` would contain `apple`.


### Arguments

If you want to set a variable by passing in an argument simply use the following:

set user [lindex $argv 0] set password [lindex $argv 1]

Then, when running the script I could supply the varaible content via:

./myscript.tcl myuser mypassword

###