Labels are clauses that appear at the start of an instruction. A label is a symbol followed by a colon. Here are some examples.
|proceed :||possible target of a signal instruction.|
|notready :||possible target of a NOTREADY condition|
|100 :||numeric labels are allowed|
|100.1 :||decimal labels are allowed|
Labels can be traced when execution passes through them -- see the trace instruction. An example follows:
trace Labels 100 : 100.1 : howdy : say 'The result of 2 + 2 is:' 2 + 2
Warning: if the target label is followed by a procedure instruction, this will cause error code 17 (unexpected procedure) to be raised.