Data Types in C Language
The C language supports a wide variety of data types. These include:
- Primitive Data Types:
– Integer: char, int, short, long, long long
– Floating Point: float, double
– Boolean: _Bool
– Void
- Derived Data Types:
– Array: int array[10]
– Pointer: int *pointer
– Structure: struct student {…}
– Union: union data {…}
– Enumeration: enum color {…}
Data Types & Sizes
| Data Type | Size (in bytes) | Description |
| char | 1 | Character type, stores a single character or ASCII code |
| int | 4 | Integer type, stores a whole number |
| float | 4 | Floating-point type, stores a decimal number with single precision |
| double | 8 | Floating-point type, stores a decimal number with double precision |
| short | 2 | Short integer type, stores a smaller whole number than int |
| long | 8 | Long integer type, stores a larger whole number than int |
| long long | 8 | Long long integer type, stores an even larger whole number than long |
| void | N/A | Void type, represents the absence of a value |
List Of Keywords of C Language
| Keyword | Description |
| auto | Defines a variable with automatic storage duration |
| break | Terminates the current loop or switch statement |
| case | Specifies a branch in a switch statement |
| char | Declares a character data type |
| const | Defines a variable as constant |
| continue | Skips the current iteration of a loop |
| default | Specifies the default branch in a switch statement |
| do | Begins a do-while loop |
| double | Declares a double-precision floating-point data type |
| else | Specifies an alternative branch in an if statement |
| enum | Declares an enumerated type |
| extern | Declares a variable or function that is defined in another file |
| float | Declares a floating-point data type |
| for | Begins a for loop |
| goto | Transfers control to a labeled statement |
| if | Begins an if statement |
| int | Declares an integer data type |
| Keyword | Description |
| long | Declares a long integer data type |
| register | Defines a variable with register storage class |
| return | Returns a value from a function |
| short | Declares a short integer data type |
| signed | Declares a signed data type |
| sizeof | Returns the size of a data type or variable |
| static | Defines a variable with static storage duration |
| struct | Defines a structured data type |
| switch | Begins a switch statement |
| typedef | Defines a new data type |
| union | Defines a union data type |
| unsigned | Declares an unsigned data type |
| void | Specifies that a function returns no value |
| volatile | Declares a variable that can be modified by hardware or other processes |
| while | Begins a while loop |
