What is the purpose of using annotations in programming?

Annotations in programming, particularly in Java, are used to add metadata to code — classes, methods, fields, etc. They do not directly affect the execution logic but allow tools and frameworks to obtain additional information for processing.

Purposes of using annotations:

• Simplifying configuration (e.g., @Override, @Deprecated).
• Automating code or configuration generation (e.g., @Entity in JPA).
• Data validation and checks during compilation or runtime.
• Integration with frameworks (e.g., Spring uses annotations for dependency injection).

Example:

@Override
public String toString() {
    return "Example of Override annotation";
}

Here, @Override indicates that the method overrides a superclass method, which helps avoid errors.