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Chapter 2 Program Instructions

RESUME

Field of Application

Statement for resuming program execution after an error-handling

subroutine has been executed.

Syntax RESUME[<<ncon>|<line label>|<NEXT>|<0>>|<HTTP>]

<ncon> is the number or label of the line to which the program

should return.

Remarks

RESUME must only be used in connection with error-handling subroutines

(see ON ERROR GOTO).

There are ﬁ ve ways of using RESUME:

RESUME Execution is resumed at the statement where

the error occurred.

RESUME 0 Same as RESUME.

RESUME NEXT Execution is resumed at the statement

immediately following the one that caused

the error.

RESUME <ncon> Execution is resumed at the speciﬁ ed line.

RESUME <line label> Execution is resumed at the speciﬁ ed line

label.

RESUME <HTTP> Execution is resumed at the point where

it was branched by an ON HTTP GOTO

statement. Stdin and stdout are restored to

their original values.

Examples

This short program is the basis for two examples of alternative subroutines:

10 ON ERROR GOTO 1000

20 FONT "Swiss 721 BT"

30 PRPOS 100,100

40 PRTXT "HELLO"

50 PRPOS 100, 300

60 PRIMAGE "GLOBE.1"

70 PRINTFEED

80 END

1. A font is selected automatically and execution is resumed from the line

after where the error occurred. If another error than the speciﬁ ed error

condition occurs, the execution is terminated.

1000 IF ERR=15 THEN FONT "Swiss 721 BT":RESUME NEXT

1010 RESUME 80

2. An error message is displayed and the execution goes on from the line

following the one where the error occurred.

1000 IF ERR=15 THEN PRINT "Font not found"

1010 RESUME NEXT

1 2 ... 220 221 222 223 224 225 226 227 228 229 230 ... 331 332

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UBI EasyCoder 201 IIE Manuel d'instructions Page 225

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