♦ C Data Types
♣ About C Data Types
Data Types are fundamentally classified based on the amount of memory for each Data Types.Each Data Type can hold a different type of entity.
Some common occurring Data Types are int, float, string.
♣ Data Types in C
C has numerous Built-IN Data Types.| Types | Description |
|---|---|
| Basic Types | These are arithmetic types and are further classified into: (a) integer types and (b) floating-point types. |
| Enumerated types | They are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the program. |
| The type void | The type specifier void indicates that no value is available. |
| Derived types | They include (a) Pointer types, (b) Array types, (c) Structure types, (d) Union types and (e) Function types. |
♣ Types & Their sizes
Below is a tabular explanation of Data Types| Type | Storage size | Value Range |
|---|---|---|
| char | 1 byte | -128 to 127 or 0 to 255 |
| unsigned char | 1 byte | 0 to 255 |
| signed char | 1 byte | -128 to 127 |
| int | 2 or 4 bytes | -32,768 to 32,767 or -2,147,483,648 to 2,147,483,647 |
| unsigned int | 2 or 4 bytes | 0 to 65,535 or 0 to 4,294,967,295 |
| short | 2 bytes | -32,768 to 32,767 |
| unsigned short | 2 bytes | 0 to 65,535 |
| long | 8 bytes | -9223372036854775808 to 9223372036854775807 |
| unsigned long | 8 bytes | 0 to 18446744073709551615 |