Remote-processing BASIC for the CX-10 Modbus Manual de usuario descargar pdf (Pagina 46)

BASIC PROGRAMMING GUIDE

2-37

ON GOTO

Syntax: ON

expr

GOTO

line0[,line1[line2...]]

Function: Branches to a program line based on

expr

value.

valuate to greater than or equal to zero; if

expr

evaluates to zero, execution branches to {0th line#}; if

expr

evaluates to one, execution branches to {1st line#}, etc. Commas shown are required.

Mode: Run

Use: ON A/5 GOTO 100, 200, 500

DESCRIPTION

The ON-GOTO instruction conditionally branches to

line

n where 'n' is the value of

expr

. The

expr

must

evaluate to greater than or equal to zero. When

expr

evaluates to zero, execution branches to

line0

. When

expr

evaluates to one, execution branches to

line1

, etc. If necessary,

expr

is truncated to an integer.

One or more of the program lines may be the same, to GOTO the same location with different

expr

values.

At least one program line must be provided. Program lines may occur in any order, for example, ON A

GOTO 500,700,600.

GOTO, GOSUB, ON-GOSUB

ERRORS

BAD ARGUMENT The value of

expr

is less than 0.

BAD SYNTAX The

expr

value is greater than the number of {"nth" line#} numbers provided, or

commas were omitted between {line#} values, or no line numbers were provided after

the ON-GOTO.

EXAMPLE

10 P=2

20 ON P GOTO 1000,2000,3000

30 END

1000 PRINT "Line 1000"

1010 END

2000 PRINT "Line 2000"

2010 END

3000 PRINT "Line 3000"

3010 END

>run

Line 3000

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 83 84

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Remote-processing BASIC for the CX-10 Modbus Manual de usuario Pagina 46

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