From MorphOS Library
Lab - Defines a label in a batch file
Lab is used in script to define a label that is searched for by the Skip command. The label can be of any length, but must be alphanumeric. No symbols are allowed. If the label contains spaces, it must be enclosed in quotation marks.
If EXISTS ram:test SKIP oky EndIf echo "File 'ram:test' does not exist." QUIT LAB oky echo "File 'ram:test' exists."