Which of the following is true for variable names in C?
A)They can contain alphanumeric characters as well as special characters
B)It is not an error to declare a variable to be one of the keywords(like goto, static)
C)Variable names cannot start with a digit
D)Variable can be of any length

Question

Quizplus · Accepted Answer

Variable names in C must start with a letter (either uppercase or lowercase) or an underscore (_), but not with a digit. This is why option C is correct. Options A, B, and D are incorrect because: A) Variable names cannot contain special characters except for the underscore (_), B) Using keywords as variable names is not allowed and will result in a compilation error, and D) There is a limit to the length of variable names that the C compiler will recognize, typically 31 characters for many compilers, though the standard only requires compilers to recognize the first 63 characters for external names and 31 for internal names.

Which of the Following Is True for Variable Names in C