[[modding:function:block]]

=== block ===

[[modding:function:block]]

^ Syntax | (block list exp1 ... expn) -> value of last expression |
^ Arguments | list: A list of local variables. Can be Nil or empty. Can contain initial values. |
^ | exp1 ... expn: A series of expressions (anything you want to do). |
^ Returns | Whatever the last expression in the block returns |
^ Category | [[control structure functions|control structure]] |
^ Description | Allows you to run several expressions as one group - for example as either the 'true' or 'false' expression of an [[if]] function. Also used to wrap variables that you want to be local. Those variables can be given default values using the syntax (variable value). See example for more details. |

=== Example ===

<code lisp>
(block Nil
  (block (varA)
    (setq varA "varA")
    (block ((varB "varB") varC)
      (dbgOutput "varC, varB and varA are valid here. varB has a default value, varC is Nil")
    )
    (dbgOutput "varA is valid here. varB and varC are invalid and would cause errors to use.")
  )
)
</code>
Return to [[:Functions]] list