May 5, 2021

A C identifier is a name used to identify a variable, function, or any other user-defined
item. An identifier starts with a letter A to Z or a to z or an underscore _ followed by zero
or more letters, underscores, and digits (0 to 9).
C does not allow punctuation characters such as @, $, and % within identifiers. C is a case
sensitive programming language. Thus, Manpower and manpower are two different
identifiers in C. Here are some examples of acceptable identifiers:
mohd zara abc move_name a_123
myname50 _temp j a23b9 retVal