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VariablesWhich of the following is true for variable names in C?OptionsIt is not an error to declare a variable to be one of the keywords (like goto, static)Variable names cannot start with a digitVariable can be of any lengthThey can contain alphanumeric characters as well as special characters

Question

VariablesWhich of the following is true for variable names in C?OptionsIt is not an error to declare a variable to be one of the keywords (like goto, static)Variable names cannot start with a digitVariable can be of any lengthThey can contain alphanumeric characters as well as special characters

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Solution

The correct statement about variable names in C is: "Variable names cannot start with a digit".

Here's why:

  1. "It is not an error to declare a variable to be one of the keywords (like goto, static)": This is incorrect. In C, keywords are reserved words in the language's syntax. You cannot use them as variable names.

  2. "Variable names cannot start with a digit": This is correct. In C, variable names must start with a letter or an underscore.

  3. "Variable can be of any length": This is not entirely correct. While theoretically a variable name could be of any length, in practice, the C standard only guarantees that the first 31 characters of a variable name will be unique. So it's best to keep variable names under 31 characters.

  4. "They can contain alphanumeric characters as well as special characters": This is incorrect. Variable names in C can only contain alphanumeric characters and underscores. Special characters are not allowed.

This problem has been solved

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