Metrologic IS1000 Series Guía de usuario descargar pdf (Pagina 37)

Chapter

BASIC

Comman

Example

DataCount% = TRANSACTION_COUNT

FOR Counter% = 1 TO DataCount%

Data$ = GET_TRANSACTION_DATA$(Counter%)

HostCommand$ = READ_COM$(1)

IF HostCommand$ = "STOP" THEN EXIT

WRITE_COM(1,Data$)

FOR ... NEXT

Purpose

To repeat the execution of a block of statements for a specified number of times.

Syntax

FOR N% = startvalue TO endvalue [STEP step]

[Statement Block]

NEXT [N%]

Remarks

"N%" is an integer variable to be used as a loop counter.

"startvalue" is a numeric expression which is the initial value for the loop counter.

"endvalue" is a numeric expression which is the final value for the loop counter.

"step" is a numeric expression to be used as an increment/decrement of the loop

counter The "step" is 1 by default.

If the loop counter ever reaches or beyond the endvalue, the program execution

continues to the statement following the NEXT statement. The Statement block will

be executed again otherwise.

Example

DataCount% = TRANSACTION_COUNT

FOR Counter% = 1 TO DataCount%

Data$ = GET_TRANSACTION_DATA$(Counter%)

WRITE_COM(1,Data$)

WHILE ... WEND

Purpose

To repeat the execution of a block of statements while a certain condition is TRUE.

Syntax

WHILE condition

[Statement Block]

WEND

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 197 198

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Metrologic IS1000 Series Guía de usuario Pagina 37