Difference between Variable and Constant
| Characteristic | Variable | Constant |
|---|---|---|
| Definition | A variable is a symbol that represents a value that can change during program execution. | A constant is a symbol that represents a fixed, unchanging value. |
| Mutability | Can be changed or reassigned during the execution of the program. | Cannot be changed once assigned a value. |
| Declaration and Initialization | Must be declared before use, and its value can be initialized at declaration or later in the code. | Must be assigned a value at the time of declaration, and its value cannot be changed afterward. |
| Examples | int count = 5; | const double PI = 3.14159; |
| Use Cases | Used for storing values that may vary or change during program execution. | Used for storing fixed values or parameters that should not be modified. |
| Memory Allocation | Allocates memory space to store the value. | Allocates memory space to store the value, similar to variables. |
| Syntax | dataType variableName = value; | const dataType constantName = value; |
Variable in Programming
In programming, we often need a named storage location to store the data or values. Using variables, we can store the data in our program and access it afterward. In this article, we will learn about variables in programming, their types, declarations, initialization, naming conventions, etc.
Variables in Programming
Table of Content
- What are Variables In Programming?
- Declaration of Variables In Programming
- Initialization of Variables In Programming
- Types of Variables In Programming
- Difference between Variable and Constant
- Difference between Local variables and Global Variables
- Naming Conventions
- Scope of a variable