C/C++ Programming : Identifier names
Identifiers are the names which are used to reference variables, functions, labels and user defined objects. Valid length of an identifier is 1 to 32 characters. The first character of an identifier must be a letter or it can be an underscore with subsequent characters including letters numbers and the underscore. We can use $ in an identifier name but use of $ is not recommended. Let’s have a look on the example of correct and incorrect use of identifier names.
Identifier names are case sensitive. HELLO, hello and Hello are three different identifiers. We cannot use C keyword as identifier and it cannot be same as standard library funtions.
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