Control Structures

The following control structures are supported:

• if condition then
  statement
  [elseif condition then
  statement]
  [else
  statement]
  end if
• select case expression
  [case expression:
  statement]
  [else
  statement]
  end select
• for counter = start to / downto end [step stepvalue]
  statement
  [exit]
  statement
  next
• while condition
  expression
  wend
• do
  expression
  loop until
• return

The "if" in "end if" and the "select" in "end select" are not optional.

You can also write functions and subroutines.

• function name ([parameterlist]) as type
  statement
  [return [value of type]]
  [statement]
  end function
• Sub([parameterlist]
  statement
  [return [value of type]]
  [statement]
  end sub

Functions and subroutines must be defined before they are used.

Parameters in functions and subroutines can be defined byref or byval, byval being the default, except for arrays.

Notes:

• You cannot use function within functions.
• Do not write endless loops, as this will block your computer.
• Avoid to create very big text strings within your loops or your programm will crash.