📚 SUB definition syntax diagrams

A subroutine (of the "structured BASIC" kind) is defined with a "SUB definition block", as per the following syntax diagram:

(Click on the image to enlarge)

(/EOL/ means "end of line.")

Details below for "SUB statement", "statement", and "statement exclusion list".

SUB statement syntax diagram:

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"Legal" statements that can be used in a SUB definition block can be any statement found in this list of BASIC statements with the exception of the following statements (illegal in SUB definition blocks):

• DECLARE FUNCTION
• DECLARE SUB
• DEFDV
• DEFINT
• DEFLNG
• DEFSNG
• DEFSTR
• END FUNCTION
• END RECORD
• END STRUCT
• END STRUCTURE
• END SUB
• END TYPE
• FUNCTION
• RECORD
• STRUCT
• STRUCTURE
• SUB
• TYPE