4-310 Detailed explanation of command words
4MELFA-BASIC V
(Label)
[Function]
This indicates the jump site.
[Format]
[Terminology]
<Label Name> Describe a character string that starts with an alphabetic character.
Up to 16 characters can be used. (Up to 17 characters including *.)
<Command line> The command line can be described after the colon after the label (:).
[Reference Program]
1 *SUB1
2 If M1=1 Then GoTo *SUB1
3 *LBL1 : IF M_In(19)=0 Then GoTo *LBL1 ' Wait by the step 3 until the input signal of No. 10 turns on.
[Explanation]
(1) An error will not occur even if this is not referred to during the program.
(2) If the same label is defined several times in the same program, an error will occur at the execution.
(3) The reserved words can't be used for the label.
(4) The underscore ("_") cannot be specified as the 2nd character. This form is for the system external vari-
able. For example, "*A_", "*B_", "*Z_", etc. are the syntax error.
When using the "*L_", the error occur at execution. This form is reservation for the system.
In addition, the underscore ("_") can be used in the 3rd character or later.
(5) The software J1 or later, the command line can be described after the colon after the label (:). However,
after the command line, the colon cannot be described and the command line cannot be described
again.
*<Label Name>
*<Label Name> [:<Command line>]
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