C Language 32 keywords (1)

1 Data type Keywords (12):

(1) Char: Declaring a character variable or function

(2) Double: declares a double-precision variable or function

(3) Enum: declaring enum type

(4) Float: Declare a floating-point variable or function

(5) Int: Declaring an integer variable or function

(6) Long: Declares a long integer variable or function

(7) Short: Declare a variable or function

(8) Signed: Declaring a signed type variable or function

(9) struct: declares struct-body variable or function

Union: Declaring a common body (union) data type

(one) unsigned: declaring an unsigned type variable or function

void: Declares a function with no return value or no argument, declares an untyped pointer (basically three effects)

2 Control Statement Keywords (12):

A loop statement

(1) For: A looping statement (can be sensed inexpressible)

(2) Do: loop body of Loop statement

(3) While: loop condition of the loop statement

(4) Break: Jump out of the current loop

(5) Continue: End the current cycle and start the next cycle

B Conditional statement

(1) if: Conditional statement

(2) ELSE: Conditional statement Negation branch (with IF)

(3) Goto: Unconditional Jump Statement

C Switch statement

(1) Switch: for switch statements

(2) Case: switch Statement Branch

(3) Default: "Other" branch in the switch statement

D Return statement

Return: Subroutine return statement (can take parameters, also see without parameters)

3 Storage Type Keywords (4)

(1) Auto: Declares that automatic variables are generally not used

(2) extern: Declaring a variable is declaring it in another file (and can also be seen as a reference variable)

(3) Register: Declare the variable of the accumulation device

(4) Static: Declaring a static variable

4 other Keywords (4):

(1) Const: Declaring read-only variables

(2) sizeof: Calculate data type length

(3) typedef: Used to alias data types (and of course other functions

(4) Volatile: Explanatory variables can be implicitly changed in program execution

C Language 32 keywords (1)