Keywords - C Language Tutorial

Definition
Keywords are the words that have special meaning, which is already described to the C compiler.

Description
Following are only 32 keywords described to the C compiler. These keywords cannot be used as identifier in the program, if used compiler will raise an error 'invalid name' or 'declaration terminated incorrectly' while compiling the program. A detailed description of some main keywords is explained in further points.

1. auto
2. break
3. case
4. char
5. const
6. continue
7. default
8. do
9. double
10. else
11. enum
12. extern
13. float
14. for
15. goto
16. if
17. int
18. long
19. register
20. return
21. short
22. signed
23. sizeof
24. static
25. struct
26. switch
27. typedef
28. union
29. unsigned
30. void
31. volatile
32. while

So remember other than these keyword names mentioned above you can use any name of variable length starting from alphabet or underscore followed by alphabets and numbers for variables, functions, arrays, pointers etc.

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