Keywords in C Language

Keywords in C Language

1. the keywords in C language all have practical significance.

2. The 23 keywords in C language are as follows:

 

Char: declare a struct variable.

Short: declare the short integer variable.

Int: declares an integer variable.

Long: declares a long integer variable.

Float: Declares floating point variables.

Double: Declares double-precision variables.

 

Struct: Declares struct variables.

Union: declares a shared object variable.

Enum: Declares the enumeration type.

Typedef: used to obtain the alias for this data type.

 

 

Const: Declares Read-Only variables.

Unsigned: Declares unsigned type variables.

Signed: declares a variable of the signed type.

Extern: declared variables are declared in other files.

Auto: Declares automatic variables.

Register: Declares register variables.

Static: declare static variables.

Volatitle (changeable and unstable): declares that variables can be implicitly changed during program execution.

Void: declares that a function has no return value or no parameter and has no type pointer.

 

If: A Condition Statement.

Else: The Condition Statement denies the branch.

Switch: Used for the switch statement.

Case: switch statement branch.

Default: Other "branches" in the switch statement ".

 

For: a loop statement.

Do: the body of the loop statement.

While: the loop condition of the loop statement.

Continue: end the current cycle and start the next cycle.

Break: jumps out of the current loop.

Goto: an unconditional jump statement.

 

 

Sizeof: calculates the length of the data type.

Return: subprogram return statement.