COMPUTER SCIENCE AND ENGINEERING
DATA STRUCTURES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -NEVER use uppercase for every letter in a variable name, because uppercase names are reserved for constant variables.
Detailed explanation-2: -By Convention: Variable names begin with a lowercase letter, and class names begin with an uppercase letter. If a variable name consists of more than one word, the words are joined together, and each word after the first begins with an uppercase letter, like this: isVisible .
Detailed explanation-3: -Rules for naming a variable A variable name can only have letters (both uppercase and lowercase letters), digits and underscore. The first letter of a variable should be either a letter or an underscore.
Detailed explanation-4: -Variable names can be arbitrarily long. They can contain both letters and digits, but they have to begin with a letter or an underscore. Although it is legal to use uppercase letters, by convention we don’t. If you do, remember that case matters.
Detailed explanation-5: -A variable name must start with a letter or an underscore character ( ) A variable name cannot start with a digit. A variable name can only contain alpha-numeric characters and underscores ( a-z, A-Z, 0-9, and ) Variable names are case-sensitive (age, Age and AGE are three different variables)