Brief explanation of the meaning of each keyword in the C programming language:

Here is a brief explanation of the meaning of each keyword in the C programming language:

1. auto – declares a local variable with automatic storage duration (default for local variables)
2. break – exits the current loop or switch statement
3. case – specifies a particular branch of a switch statement
4. char – declares a variable of type char (character)
5. const – declares a variable whose value cannot be modified
6. continue – skips to the next iteration of the current loop
7. default – specifies the default branch of a switch statement
8. do – starts a do-while loop
9. double – declares a variable of type double (double-precision floating-point number)
10. else – specifies the branch of an if statement that is executed if the condition is false
11. enum – declares an enumerated type (a type consisting of a set of named integer values)
12. extern – declares a variable or function that is defined elsewhere
13. float – declares a variable of type float (single-precision floating-point number)
14. for – starts a for loop
15. goto – transfers control to another part of the program
16. if – specifies a conditional statement
17. int – declares a variable of type int (integer)
18. long – declares a variable of type long (long integer)
19. register – declares a variable that should be stored in a register (hint to the compiler, not a requirement)
20. return – exits the current function and returns a value to the calling function
21. short – declares a variable of type short (short integer)
22. signed – declares a variable of type signed (integer that can be positive or negative)
23. sizeof – determines the size of a variable or data type in bytes
24. static – declares a variable with static storage duration or a function that has internal linkage
25. struct – declares a structure (a user-defined composite data type)
26. switch – starts a switch statement
27. typedef – creates an alias for a data type
28. union – declares a union (a type consisting of a set of variables, each of which shares the same memory location)
29. unsigned – declares a variable of type unsigned (non-negative integer)
30. void – declares a function that returns no value or a pointer that can point to any type
31. volatile – declares a variable that may be modified in an unexpected way (e.g. by an interrupt handler)
32. while – starts a while loop

Please note that these are brief explanations and the usage of keywords may vary in different context and programming scenarios.