Explanation of keywords in C language;
Auto: declare an automatic variable.
Break: jump out of the current loop.
Case: switch statement branch
Char: Declares the return value type of a character variable or function.
Const: declare a read-only variable
Continue: End the current cycle and start the next cycle.
Default:switch "default" branch in the switch statement.
Do: the loop body of the loop statement
Double: Declares the return value type of a double-precision floating-point variable or function.
Else: Negative branch of conditional statement (used with if)
Enumeration: Declaring Enumeration Type
Extern: Declares that a variable or function is defined in another file or elsewhere in the file.
Float: Declares the return value type of a floating-point variable or function.
For: loop statement
Goto: unconditional jump statement
If: conditional statement
Int: Declare an integer variable or function.
Long: Declares the return value type of a long variable or function.
Register: declare a register variable.
Return: The subroutine returns the statement (with or without parameters).
Short: Declare a short integer variable or function.
Signed: Declares a signed type variable or function.
Sizeof: Calculate the data type or variable length (that is, the number of bytes occupied).
Static: declare a static variable.
Structure: Declare the structure type.
Switch: used to switch statements.
Typedef: Alias used for data types.
Unsigned: Declare an unsigned type variable or function.
Union: declare * * * theme type.
Void: Declare that the function has no return value or no parameters, and declare an untyped pointer.
Volatile: indicates that variables can be changed implicitly during program execution.
While: loop condition of loop statement
Refer to the above content: Baidu Encyclopedia -C language keywords