Introduction to Scope and Lifetime of Variables

Scope and lifetime define where and how long a variable exists in your program. Understanding these concepts is crucial for writing efficient and error-free code.

In this lesson, you’ll learn about global and local variables, as well as the concept of variable lifetime.

What is Scope?

Scope refers to the region of a program where a variable is accessible. Variables can have either global or local scope:

• Global Scope: The variable is accessible throughout the entire program.
• Local Scope: The variable is accessible only within the function where it is defined.