A keyword is a reserved word. You cannot use it as a variable name, constant name, etc.
There are only 32 reserved words (keywords) in the C language.
A list of 32 keywords in the c language is given below.
| auto | break | case | char |
| const | continue | default | do |
| double | else | enum | extern |
| float | for | goto | if |
| int | long | register | return |
| short | signed | sizeof | static |
| struct | switch | typedef | union |
| unsigned | void | volatile | while |
- >if, else, switch, case, default
- Used for decision control programming structure.
- >break
- Used with any loop OR switch case.
- >int, float, char, double, long
- These are the data types and used during variable declaration.
- >for, while, do
- types of loop structures in C.
- >void
- One of the return type.
- >goto
- Used for redirecting the flow of execution.
- >auto, signed, const, extern, register, unsigned
- defines a variable.
- >return
- This keyword is used for returning a value.
- >continue
- It is generally used with for, while and dowhile loops, when compiler encounters this statement it performs the next iteration of the loop, skipping rest of the statements of current iteration.
- >enum
- Set of constants.
- >sizeof
- It is used to know the size.
- >struct, typedef
- Both of these keywords used in structures (Grouping of data types in a single record).
- >union
- It is a collection of variables, which shares the same memory location and memory storage.
- >volatile
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