The Control Flow Loops

Switch Loop

Evaluate one of several scripts, depending on a given value.

Syntax:
switch ?options? string { pattern body ?pattern body ...? }

I like this syntax better...


switch ?options? { string } {

pattern { body }

?pattern { body } 

...? 

}

?options? can be any of the below -

-exact	Use exact matching when comparing string to a pattern. This is the default.
-glob	When matching string to the patterns, use glob-style matching (i.e. the same as implemented by the string match command).
-regexp	When matching string to the patterns, use regular expression matching

Switch is very similar to the if-else commands. So I will use the same example I used there.

#The marriage status script...
#Change the status please
set marital_status "After"

label .thesis -text "Marriage is a three ring circus..."

switch $marital_status {
"Before" { set ring "Engagement" }
"During" { set ring "Wedding" }
default { set ring "suffe -" }
}

label .proof -text "$marital_status Marriage: $ring ring"

pack .thesis
pack .proof

Run this script and give the 'marital_status' to "Before", "During" and "After" and see the different results.

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