Gosub : Return

Gosub MyLabel 
   
MyLabel: 
  ...
Return

Gosub stands for 'Go to sub routine'. A label has to be specified after Gosub then the program will continue at the label position until it encounters a Return. When a return is reached, the program is transferred below the Gosub. Gosub is very useful when building fast structured code.

Another possibility to put a sub routine into a standalone program component is to use procedures.

Example:

  a = 1
  b = 2
  Gosub ComplexOperation 
  Debug a 
  End 
       
  ComplexOperation: 
    a = b*2+a*3+(a+b) 
    a = a+a*a 
  Return 

FakeReturn 

When you want to jump from a sub routine (with the command Goto) to another part in the code outside of this sub routine, you need to use a FakeReturn which simulate a return without do it really. If you don't use it, your program will crash. This function should be useless because a well constructed program don't use Goto. But sometimes, for speed reason, it could help a bit.

Example:

  Gosub SubRoutine1
     
  SubRoutine1:
    ...
    If a = 10
      FakeReturn 
      Goto Main_Loop 
    EndIf 
  Return