While specifics may vary from language to language, in general an identifier
A) must be made up only of letters
B) starts with two digits followed by an underscore and letters
C) cannot contain numbers, spaces, or special characters
D) starts with a letter and is followed by letters, numbers, or underscores

Question

Quizplus · Accepted Answer

Identifiers in many programming languages can start with a letter (or sometimes an underscore) and may be followed by letters, numbers, or underscores. This allows for a wide range of names for variables, functions, etc., while maintaining a structure that is easy for both the compiler/interpreter and programmers to understand. Options A, B, and C are incorrect as they describe restrictions that are not universally applied across programming languages.

While Specifics May Vary from Language to Language, in General