Keywords

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Keywords are predefined, reserved words used in programming that have special meanings to the compiler. Keywords are part of the syntax and they cannot be used as an identifier. For example:

int mobile

Here, int is a keyword that indicates mobile is a variable of type int (integer).

There are total 32 keywords in C.

auto double int struct
break else long switch
case enum register typedef
char extern return union
continue for signed void
do if static while
default goto sizeof volatile
const float short unsigned

As C is a case sensitive language, all keywords must be written in lowercase. Here is a list of all keywords allowed in ANSI C.

All these keywords, their syntax, and application will be discussed in their respective topics. However, if you want a brief overview of these keywords without going further.