Variable - Revision history

Laura: /* Variable Scope */

2015-06-29T17:10:10Z

Variable Scope

← Older revision		Revision as of 17:10, 29 June 2015
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	==Variable Scope==		==Variable Scope==

	Variables in BR have global scope. This means that while your program is running, no matter what the current line it is executing, it knows the current value of all variables it contains. There is one [[Local variable\|exception to this rule]], and it should be discussed after the reader learns the concept of [[User Defined Functions]].		Variables in BR have global scope. This means that while your program is running, no matter what the current line it is executing, it knows the current value of all variables it contains. There is one [[Local variable\|exception to this rule]], and it should be discussed after the reader learns the concept of [[User Defined Functions#Library Variables \| User Defined Functions]].

	If you wish to pass the values of your variables to a different program after your program finishes executing, you may do so with a [[Chain]] statement.		If you wish to pass the values of your variables to a different program after your program finishes executing, you may do so with a [[Chain]] statement.

2015-06-29T17:02:02Z

Example

← Older revision		Revision as of 17:02, 29 June 2015
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	00070 print #255: landmark$&" is in "&name$		00070 print #255: landmark$&" is in "&name$

	~~line~~ 70 will return:		Notice that string variables must end with a dollar sign ($). Line 70 will return:

	Times Square is in New York.		Times Square is in New York.

2015-06-29T17:01:24Z

Example

2015-06-29T17:01:11Z

Example

@@ Line 20: / Line 20: @@
 let a = a + 1
 let result = a - b
 ==Naming Requirements==

2015-06-29T16:49:56Z

← Older revision		Revision as of 16:49, 29 June 2015
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	#[[String]]		#[[String]]

	Additionally either of these types of variables may be contained in [[:Category:Arrays\|arrays]].		Additionally either of these types of variables may be contained in [[:Category:Arrays\|arrays]], aka [[Mat]]rices.

	==Example==		==Example==

2014-05-05T14:46:41Z

← Older revision		Revision as of 14:46, 5 May 2014
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			{<[[String]] variable> \| <[[numeric variable]]>}

	A variable is a way of referring to a memory location used in a computer program.		A variable is a way of referring to a memory location used in a computer program.

2013-01-09T20:31:38Z

Variable Scope

← Older revision		Revision as of 20:31, 9 January 2013
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	==Variable Scope==		==Variable Scope==

	Variables in BR have global scope. This means that while ~~you~~ program is running, no matter what the current line it is executing, it knows the current value of all variables it contains. There is one [[Local variable\|exception to this rule]], and it should be discussed after the reader learns the concept of [[User Defined Functions]].		Variables in BR have global scope. This means that while your program is running, no matter what the current line it is executing, it knows the current value of all variables it contains. There is one [[Local variable\|exception to this rule]], and it should be discussed after the reader learns the concept of [[User Defined Functions]].

	If you wish to pass the values of your variables to a different program after your program finishes executing, you may do so with a [[Chain]] statement.		If you wish to pass the values of your variables to a different program after your program finishes executing, you may do so with a [[Chain]] statement.

2013-01-09T20:09:12Z

Example

← Older revision		Revision as of 20:09, 9 January 2013
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	==Example==		==Example==

	Let's imagine that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize ~~also the~~ number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. ~~Values that we~~ could now for example subtract and obtain 4 as result.		Let's imagine that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. We could now, for example, subtract one from the other and obtain 4 as result.

	The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set:		The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set:

2013-01-09T20:05:41Z

Example

← Older revision		Revision as of 20:05, 9 January 2013
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	==Example==		==Example==

	~~Just~~ imagine that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize also the number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. Values that we could now for example subtract and obtain 4 as result.		Let's imagine that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize also the number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. Values that we could now for example subtract and obtain 4 as result.

	The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set:		The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set:

2013-01-09T20:04:34Z

Example

← Older revision		Revision as of 20:04, 9 January 2013
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	==Example==		==Example==

	~~Let us think~~ that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize also the number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. Values that we could now for example subtract and obtain 4 as result.		Just imagine that I ask you to retain the number 5 in your mental memory, and then I ask you to memorize also the number 2 at the same time. You have just stored two different values in your memory. Now, if I ask you to add 1 to the first number I said, you should be retaining the numbers 6 (that is 5+1) and 2 in your memory. Values that we could now for example subtract and obtain 4 as result.

	The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set:		The whole process that you have just done with your mental memory is a simile of what a computer can do with two variables. The same process can be expressed in BR with the following instruction set: