Variables and Data Types

In C programming, variables are used to store and manipulate data. Each variable has a specific data type that determines the kind of data it can hold and the operations that can be performed on it. Here are some common data types and their descriptions in C:

Before using a variable, it needs to be declared. The declaration involves specifying the variable's name and data type.

C provides several data types that represent different kinds of data. Each data type has a specific range of values and operations that can be performed on it.

Common data types in C include:

Integer types represent whole numbers and can be signed or unsigned. They differ in their size and range of values they can hold.

Floating-point types represent numbers with a fractional part, such as decimal values. They provide different levels of precision and range.

char represents individual characters. It can hold any character from the ASCII character set.

The void type indicates the absence of a type. It is often used as a return type for functions that do not return a value.


Constants and Literals

Constants are fixed values that cannot be changed during program execution. They are typically used to represent values that remain constant.

Constants can be represented using literals, which are direct representations of a value within the code.

Type Modifiers

Type modifiers allow you to modify the properties of a basic data type in C, such as their range or signedness.

signed and unsigned are used with integer types (int, char, etc.) to specify whether the variable can represent negative or non-negative values.