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Questions and Answers
What is a valid starting character for a variable name?
Which of the following is a best practice for naming variables?
What is a characteristic of a well-named variable?
Why is myvariable a bad variable name?
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What is i commonly used for in variable naming?
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Study Notes
Naming a Variable
Rules for Naming Variables
- Variables must start with a letter (a-z or A-Z) or an underscore (_)
- Variables cannot start with a number (0-9)
- Variables can only contain letters (a-z or A-Z), numbers (0-9), or underscores (_)
- Variables are case-sensitive (e.g.,
myVariableandMyVariableare different)
Best Practices for Naming Variables
- Use descriptive names to indicate the variable's purpose or content
- Use camelCase or underscore notation to separate words in a variable name
- Avoid using single-letter variable names unless it's a commonly accepted convention (e.g.,
ifor an index) - Avoid using abbreviations unless they are widely recognized
Examples of Good Variable Names
-
averageScore -
customerName -
totalCost -
isAuthorized
Examples of Bad Variable Names
-
a(too vague) -
x1(too cryptic) -
myvariable(should bemyVariablefor readability)
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Description
Learn the rules and best practices for naming variables in programming. Understand how to create descriptive and readable variable names.
