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Researching Variable Naming Rules

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PT 1420 Unit 2 Research Assignment 1
12/28/2013
Unit 2 Research Assignment 1: Researching Variable Naming Rules
Variable Naming Rules of Visual Basic * The first character must be a letter. * The usage of spaces, period (.), comma (,), Exclamation mark (!), or the characters @, &, $, # in the variable name are not allowed, but the underscore (_) is a valid character. * The name must be less than 256 characters in length. * You cannot use any names that are the identical as the functions, statements, and methods in Visual Basic.
Variable Naming Rules of Python * The first character of the variable name must begin with a letter (a – z, A – Z), or an underscore (_). * The name can only consist of letters, numbers, and underscores (no special characters). * Variable names are case sensitive. * The variable name cannot be identical as a reserved name in Python due to the fact that Python uses them for other things.

Variable Naming Rules of Java * Variable names are case sensitive. * A variable name can be any length as long as it is within the Unicode letter and digit standard, also you should use a letter as the first character of the variable word. You are allowed to use the dollar sign or underscore ($, _ ) as a first character but it isn’t recommended. * The only characters other than letters and number that can be used is the dollar sign and underscore (“$”, “_”), and no other special characters may be allowed. * If you are only using one word for the variable name it is advised to use all lower case. In the case of the variable name being more than one word you should capitalize the first letter of the following word or words. * You cannot use a reserved word or keyword for the variable name.
Similarities and Differences of Visual Basic, Python, and Java Similarities | Differences | 1. You are not allowed to use a reserved word or keyword as the variable name. | 1. The only language that requires the first character of the variable name to be a letter is VB. In both Python and Java you can use the underscore (_) as the first character of the variable word, but it is not recommended. | 2. The underscore character (_) is allowed in all three languages. | 2. The dollar sign ($) is only allowed in the Java language, but in VB and Python it is not allowed. | 3. You are not allowed to use white space in the variable name. | 3. In all three languages, there are different restrictions to the variable words. For instance, in VB you can only use up to 255 characters in the variable word, and on the other hand you can use a lot more in Python and in Java it is unlimited. Another example differences is the case sensitivity, in which both Python and Java are case sensitive in the variable names as VB isn’t case sensitive. |

Citations 1. Visual Basic Naming Rules. (n.d.). Â [Visual Basic for Applications Language Reference Help for Office 2007]. Retrieved December 28, 2013, from http://msdn.microsoft.com/en-us/library/office/ee440536(v=office.12).aspx 2. Rules for Naming Variables in Visual Basic. (n.d.). <i> Invalid & Valid Variable Names</i>. Retrieved December 28, 2013, from http://virtual.parkland.edu/kcouch/CIS122/Week2/Exercises/goodname%20badname%20answers.htm 3. Python Variable Naming Rules | Programmr. (n.d.). <i>Python Variable Naming Rules | Programmr</i>. Retrieved December 28, 2013, from http://www.programmr.com/index.php?q=python-variable-naming-rules 4. Python Variable. (n.d.). <i>w3resource</i>. Retrieved December 28, 2013, from http://www.w3resource.com/python/python-variable.php 5. Severance, C. (n.d.). Variables, Expressions, and Statements. Python Learn. Retrieved December 28, 2013, from http://www.py4inf.com/lectures/Py4Inf-02-Expressions.pdf 6. Variables. (n.d.). (The Java™ Tutorials > Learning the Java Language > Language Basics). Retrieved December 31, 2013, from http://docs.oracle.com/javase/tutorial/java/nutsandbolts/variables.html 7. Java variable naming rules. (n.d.). Learn Programming Language Step By Step. Retrieved December 31, 2013, from http://www.c4learn.com/java/java-variable-naming-rules/

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