In C Programming language, there are many rules so to avoid different types of errors. One of such rule is not able to declare variable names with auto, long, etc. This is all because these are keywords. Let us check all keywords in C language.
What are Keywords?
Keywords are predefined or reserved words that have special meanings to the compiler. These are part of the syntax and cannot be used as identifiers in the program. A list of keywords in C or reserved words in the C programming language are mentioned 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 |
For a better understanding of C syntax and keyword usage, our C programming course covers all the essential C keywords and how they fit into the structure of a C program
auto
auto is the default storage class variable that is declared inside a function or a block. auto variables can only be accessed within the function/block they are declared. By default, auto variables have garbage values assigned to them. Automatic variables are also called local variables as they are local to a function.
auto int num;
Here num is the variable of the storage class auto and its type is int. Below is the C program to demonstrate the auto keyword
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