Loop - Revision history

CSGuy at 02:18, February 22, 2009

2009-02-22T02:18:47Z

Ed Poor: Reverted edits by DrSandstone (Talk) to last version by Ed Poor

2008-12-02T17:44:05Z

Reverted edits by DrSandstone (Talk) to last version by Ed Poor

DrSandstone at 17:40, December 2, 2008

2008-12-02T17:40:05Z

DrSandstone: Replacing page with '{{disambig}} Loop (computer programming)'

2008-12-02T17:39:50Z

Replacing page with '{{disambig}} Loop (computer programming)'

Ed Poor: shipment

2008-12-02T17:35:10Z

shipment

Ed Poor: indent code blocks more

2008-12-02T17:33:50Z

indent code blocks more

Ed Poor: do while

2008-12-02T17:33:03Z

do while

Ed Poor: while loop example

2008-12-02T17:27:50Z

while loop example

Ed Poor at 17:24, December 2, 2008

2008-12-02T17:24:33Z

Ed Poor: in C and Java

2008-12-02T17:24:19Z

in C and Java

@@ Line 1: / Line 1: @@
-A '''loop''' in [[Computer Programming]] is a section of instructions which are repeated - either endlessly or until a certain expected state occurs.
+A '''loop''' in [[computer programming]] is a section of instructions which are repeated - either endlessly or until a certain expected state occurs.
 A common error made by novice programmers is to program an infinite loop, i.e., one that never ends despite the programmer's hopes.
@@ Line 34: / Line 34: @@
     queue.printStatus();
     queue.processFirstItem();
-−
   } while (queue.hasItems());
 [[Category:Computer Programming]]

← Older revision		Revision as of 17:44, December 2, 2008
Line 1:		Line 1:
−	~~{{disambig}}~~	+	A '''loop''' in [[Computer Programming]] is a section of instructions which are repeated - either endlessly or until a certain expected state occurs.
		+	A common error made by novice programmers is to program an infinite loop, i.e., one that never ends despite the programmer's hopes.

−	*[[~~Loop~~ (~~computer programming~~)]]	+	Fortran introduced the do loop, which BASIC made into the for loop. A counter is given an initial value. If it is below the maximum value, the loop's instructions are executed. Then the counter is set to the next value.
		+
		+	This trivial example prints out the first five integers:
		+	FOR I = 1 TO 5
		+	PRINT I
		+	NEXT I
		+
		+	C, Java and the other "[[curly brace]]" languages put all the control code on the first line. They typically start counting at zero, which is the first element in most arrays:
		+
		+	for (int i = 0; i < 5; i++) {
		+
		+	System.out.println( employee(i) );
		+
		+	}
		+
		+	A while loop doesn't need a counter:
		+
		+	while ( shipment.hasItems() > 0 ) {
		+
		+	Item box = shipment.getFirst();
		+	box.shipToCustomer();
		+
		+	shipment.remove(box);
		+
		+	}
		+
		+	Although a while loop won't run at all unless the condition is true, the do while loop is guaranteed to run at least once. It tests the condition at the end of each execution:
		+
		+	do {
		+
		+	queue.printStatus();
		+	queue.processFirstItem();
		+
		+	} while (queue.hasItems());
		+
		+	[[Category:Computer Programming]]

← Older revision		Revision as of 17:40, December 2, 2008
Line 1:		Line 1:
	{{disambig}}		{{disambig}}

−	[[Loop (computer programming)]]	+	*[[Loop (computer programming)]]

← Older revision		Revision as of 17:39, December 2, 2008
Line 1:		Line 1:
−	~~A '''loop''' in [[Computer Programming]] is a section of instructions which are repeated - either endlessly or until a certain expected state occurs.~~	+	{{disambig}}
−	~~A common error made by novice programmers is to program an infinite loop, i.e., one that never ends despite the programmer's hopes.~~

−	Fortran introduced the do loop, which BASIC made into the for loop. A counter is given an initial value. If it is below the maximum value, the loop's instructions are executed. Then the counter is set to the next value.	+	[[Loop (computer programming)]]
−
−	~~This trivial example prints out the first five integers:~~
−	~~FOR I = 1 TO 5~~
−	~~PRINT I~~
−	~~NEXT I~~
−
−	~~C, Java and the other "~~[[~~curly brace]]" languages put all the control code on the first line. They typically start counting at zero, which is the first element in most arrays:~~
−
−	~~for~~ (~~int i = 0; i < 5; i++~~) {
−
−	~~System.out.println( employee(i) );~~
−
−	}
−
−	~~A while loop doesn't need a counter:~~
−
−	~~while ( shipment.hasItems() > 0 ) {~~
−
−	~~Item box = shipment.getFirst();~~
−	~~box.shipToCustomer();~~
−
−	~~shipment.remove(box);~~
−
−	}
−
−	~~Although a while loop won't run at all unless the condition is true, the do while loop is guaranteed to run at least once. It tests the condition at the end of each execution:~~
−
−	~~do {~~
−
−	~~queue.printStatus();~~
−	~~queue.processFirstItem();~~
−
−	~~} while (queue.hasItems());~~
−
−	~~[[Category:Computer Programming~~]]

@@ Line 19: / Line 19: @@
 A while loop doesn't need a counter:
-  while ( boxes.getCount() > 0 ) {
+  while ( shipment.hasItems() > 0 ) {
-    Item box = boxes.getFirst();
+    Item box = shipment.getFirst();
     box.shipToCustomer();
-    boxes.remove(box);
+    shipment.remove(box);
+  }

← Older revision		Revision as of 17:33, December 2, 2008
Line 28:		Line 28:
	}		}

		+	Although a while loop won't run at all unless the condition is true, the do while loop is guaranteed to run at least once. It tests the condition at the end of each execution:

		+	do {
		+
		+	queue.printStatus();
		+	queue.processFirstItem();
		+
		+	} while (queue.hasItems());

	[[Category:Computer Programming]]		[[Category:Computer Programming]]

← Older revision		Revision as of 17:27, December 2, 2008
Line 16:		Line 16:

	}		}
		+
		+	A while loop doesn't need a counter:
		+
		+	while ( boxes.getCount() > 0 ) {
		+
		+	Item box = boxes.getFirst();
		+	box.shipToCustomer();
		+
		+	boxes.remove(box);
		+
		+	}
		+


	[[Category:Computer Programming]]		[[Category:Computer Programming]]

@@ Line 12: / Line 12: @@
   for (int i = 0; i < 5; i++) {
-−
    System.out.println( employee(i) );
-−
+  }
 [[Category:Computer Programming]]

@@ Line 4: / Line 4: @@
 Fortran introduced the do loop, which BASIC made into the for loop. A counter is given an initial value. If it is below the maximum value, the loop's instructions are executed. Then the counter is set to the next value.
-This example prints out the first five integers:
+This trivial example prints out the first five integers:
   FOR I = 1 TO 5
    PRINT I
   NEXT I
 [[Category:Computer Programming]]