Keywords in C++

Introduction to keywords

Keywords are a collection of reserved words and predefined identifiers in C++. We cannot use keywords as an identifier or a function name.

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The identifiers that are defined by the compiler are known as predefined identifiers. We can change their meaning later in a program. The main keyword is a predefined identifier. We can declare a variable called main inside our function. However, we cannot do the same thing with the else keyword because it is a reserved word.

Here is a list of commonly used keywords in C++.