Chapter 8 - Revision history

Mikhail.zheleznov: Added clarification on the difference between GOTO and GOSUB

2020-04-25T17:34:03Z

Added clarification on the difference between GOTO and GOSUB

← Older revision		Revision as of 17:34, 25 April 2020
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	You have already learned how the GOTO and GOSUB statements can be used to unconditionally transfer executions to another line or subroutine of a program. ON GOTO and ON GOSUB are similar statements that conditionally transfer execution to another line or subroutine. The Reason these transfers are considered conditional is that they make the transfer based on the value of a numeric expression in the statement.		You have already learned how the GOTO and GOSUB statements can be used to unconditionally transfer executions to another line or subroutine of a program. ON GOTO and ON GOSUB are similar statements that conditionally transfer execution to another line or subroutine. The Reason these transfers are considered conditional is that they make the transfer based on the value of a numeric expression in the statement.

			One main difference between GOTO and GOSUB is that when finished, GOSUB returns program control back to where it was called, while GOTO does NOT return.

	====The ON GOTO statement====		====The ON GOTO statement====

Mikhail.zheleznov: Corrected Formatting error

2020-04-25T17:27:14Z

Corrected Formatting error

← Older revision		Revision as of 17:27, 25 April 2020
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	00010 PRINT “What is your password?”		00010 PRINT “What is your password?”
	00020 INPUT PASSWORD$		00020 INPUT PASSWORD$
	00030 IF PASSWORD$=”WICHITA” OR “Wichita” THEN GOTO 60		00030 IF PASSWORD$=”WICHITA” OR “Wichita” THEN GOTO 60 ELSE GOTO 40
	ELSE GOTO 40
	00040 PRINT “Access denied”		00040 PRINT “Access denied”
	00050 GOTO 4540		00050 GOTO 4540

Laura at 17:43, 8 March 2017

2017-03-08T17:43:24Z

← Older revision		Revision as of 17:43, 8 March 2017
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	00010 FOR WAX = 3 TO 16		00010 FOR WAX = 3 TO 16

	The beginning value of WAX (the loop variable) will be 4; the ending value will be 16. The loop will be executed a total of 13 times.		The beginning value of WAX (the loop variable) will be 3; the ending value will be 16. The loop will be executed a total of 14 times.

	00100 FOR I = N*.5 TO 10		00100 FOR I = N*.5 TO 10

Gordon.dye: /* Using LOOPS to create time delays */

2014-12-04T11:45:07Z

Using LOOPS to create time delays

← Older revision		Revision as of 11:45, 4 December 2014
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	====Using LOOPS to create time delays====		====Using LOOPS to create time delays====

	The ~~minimum number of statements in a FOR/NEXT loop~~ is ~~two: the FOR statement and the NEXT statement~~. ~~After you key in and RUN~~ the ~~following example~~ of a ~~FOR/NEXT loop, you may come to~~ the ~~conclusion that it does nothing. However, this is not true~~.		The following example waits for an event to occur. The maximum time it will wait is 10 seconds. The event is the creation of a report data file named "report.prn" located in the "prl" folder.

	~~00010~~ FOR X = 1 TO 10		01010 FOR X = 1 TO 10
	~~00020~~ NEXT X		01020 SLEEP(1)
			01030 IF EXISTS("prl\report.prn") THEN GOTO PRINT_REPORT
			01040 NEXT X

	When Business Rules! begins executing the above loop, it assigns a value of one to X. The second time the loop is executed Business Rules! replaces the value of X with a 2. It continues to reassign the value of X, each time the loop is executed, until X is greater than 10.		When Business Rules! begins executing the above loop, it assigns a value of one to X. The second time the loop is executed Business Rules! replaces the value of X with a 2. It continues to reassign the value of X, each time the loop is executed, until X is greater than 10.

	~~Business Rules! can perform~~ the ~~above loop operation in an extremely short amount of time~~. ~~But it would take about twice as long for Business Rules! to execute~~ the ~~same~~ loop ~~20 times,~~ and ~~it would take roughly ten times as long to execute it 100 times. You’re probably saying “So what?” right now. But~~ the ~~point is that sometimes you’ll want Business Rules! to slow down~~.		However, if the file "report.prn" is placed into the "prl" folder before 10 seconds have elapsed, then the program will exit the loop and proceed at the PRINT_REPORT label.

	====Using the LOOP variable in mathematical operations====		====Using the LOOP variable in mathematical operations====

Gordon.dye: /* Nested FOR / NEXT loops */

2014-12-04T11:28:48Z

Nested FOR / NEXT loops

← Older revision		Revision as of 11:28, 4 December 2014
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	\|Right\|\|Wrong		\|Right\|\|Wrong
	\|-		\|-
	\|00010 t=1 to 6 \|\| 00010 for t=1 to 6		\|00010 for t=1 to 6 \|\| 00010 for t=1 to 6
	\|-		\|-
	\|00020 for n=0 to -3 step -1 \|\| 00020 for n=0 to -3 step -1		\|00020 for n=0 to -3 step -1 \|\| 00020 for n=0 to -3 step -1

Gordon.dye: /* Focus on NEXT */

2014-12-04T11:27:21Z

Focus on NEXT

← Older revision		Revision as of 11:27, 4 December 2014
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	\|RIGHT\|\|WRONG		\|RIGHT\|\|WRONG
	\|-		\|-
	\|00070 FOR P = 1 TO 30 \|\| 00070 FOR P = 1 TO 30		\|00070 FOR P = 1 TO 30 \|\| 00070 FOR P = 1 TO 30
	\|-		\|-
	\|00080 PRINT P \|\| 00080 PRINT P		\|00080 PRINT P \|\| 00080 PRINT P
	\|-		\|-
	\|00090 NEXT P \|\| 00090 NEXT T		\|00090 NEXT P \|\| 00090 NEXT T
	\|}		\|}

Laura: /* Chapter Exercises */

2013-08-16T17:15:35Z

Chapter Exercises

← Older revision		Revision as of 17:15, 16 August 2013
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	[[Solutions#CHAPTER 8\|Solution]]		[[Solutions#CHAPTER 8\|Solution]]

	NEXT:[[Chapter 9]]		NEXT:[[Chapter 9\|Organizing Folders and Programs]]

	[[BR Tutorial\|Back to Index]]		[[BR Tutorial\|Back to Index]]

Laura at 01:21, 16 July 2013

2013-07-16T01:21:56Z

← Older revision		Revision as of 01:21, 16 July 2013
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	<noinclude>		<noinclude>
	[[Category:Tutorial]]		[[Category:Tutorial 1]]
	</noinclude>		</noinclude>

Laura: /* Chapter Exercises */

2013-07-15T21:03:47Z

Chapter Exercises

← Older revision		Revision as of 21:03, 15 July 2013
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	[[BR Tutorial\|Back to Index]]		[[BR Tutorial\|Back to Index]]

			<noinclude>
			[[Category:Tutorial]]
			</noinclude>

Laura: /* Chapter Exercises */

2013-07-03T20:23:03Z

Chapter Exercises

← Older revision		Revision as of 20:23, 3 July 2013
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	\|120 \|\| 5.12 \|\| 494.88 \|\| 0.00		\|120 \|\| 5.12 \|\| 494.88 \|\| 0.00
	\|-		\|-
	\| ~~______~~ \|\| ~~________~~ \|\| ~~_________~~ \|\| _________		\|______ \|\|________ \|\|_________ \|\|_________
	\|-		\|-
	\| TOTAL \|\| ???????? \|\| 15,000.00 \|\| 0.00		\| TOTAL \|\| ???????? \|\| 15,000.00 \|\| 0.00