1INCLAN: goto, go to - jump to a label within a macro

Usage: goto <label>
       go to <label>

The "goto" statement continues execution of a macro at the first 
line that begins with the label. Jumps into loops (do ... end do)
or conditionally executed statements (if ... else ... end if) are 
not allowed and can lead to unpredictable results. A label may
consist of letters, digits, and underscore characters "_". A label
must be followed by a colon.