مقدمة في المتغيرات والثوابت

Introduction to Variables and Constants

• Variables are memory locations used to store data. Their content can change during program execution.
• Constants are memory locations that hold fixed values that do not change during program execution.

Variable Types

• Variables have different data types.
• The data type determines the size of memory allocated to store the variable.
• Some common data types include integers, decimals, strings, etc.

Naming Conventions

• Variables have names that are used to refer to them in the code.
• Variable names must follow specific rules defined by the programming language.

Variable Declaration

• Declaring a variable means specifying its name and data type.
• This sets aside memory space for the variable.

Variable Scope

• Variables have a scope, indicating where they can be accessed.
• This determines the lifetime of the variable.

Constant Declaration

• Constants are declared similarly to variables but with specific keywords to signify their immutable nature.

Data Type Conversion

• Converting data between different data types might be necessary depending on the program's logic.

User Interaction Methods

• Methods can be used to interact with users, such as displaying or getting input from the user
• There are various methods like MsgBox for displaying messages.