What is variable scope in programming?

What is variable scope in programming?

Variable scope refers to the accessibility of variables in different parts of your code. It determines where a variable can be used.

Can you explain the different types of variable scope?

Sure! There are mainly three types: global scope, local scope, and block scope. Global variables are accessible anywhere, local variables are accessible only within a function, and block scope is limited to the block in which it is defined.

What are some examples of each type?

For global scope, a variable declared outside any function is accessible everywhere. For local scope, a variable declared inside a function is only accessible within that function. Block scope can be seen with variables declared using 'let' or 'const' inside curly braces.

Why is understanding variable scope important?

Understanding variable scope is crucial to avoid naming conflicts, manage memory efficiently, and write cleaner, more maintainable code.