on goto -- jump to one of multiple gosub-targets

 
on a gosub foo,bar,baz 
  ... 
label foo 
  ... 
return 

label bar 
  ... 
return 

label baz 
  ... 
return 

The on gosub statement uses its numeric argument (the one between on and gosub) to select an element from the list of labels, which follows after the gosub-keyword: If the number is 1, the program does a gosub to the first label; if the number is 2, to the second and, so on. if the number is zero or less, the program continues at the position of the first label; if the number is larger than the total count of labels, the execution continues at the position of the last label; i.e. the first and last label in the list constitute some kind of fallback-slot.

Note, that the on gosub-command can no longer be considered state of the art; people (not me!) may even start to mock you, if you use it.

do 
	print "Please enter a number between 1 and 3: "
	print 
	input "Your choice " a 
	on a gosub bad,one,two,three,bad 
loop 

label bad 
	print "No. Please between 1 and 3" 
return 

label one 
	print "one" 
return 

label two 
	print "two" 
return 

label three 
	print "three" 
return 

Note, how invalid input (a number less than 1, or larger than 3) is automatically detected.