What is variable scope in programming?

What is variable scope in programming?

Variable scope refers to the accessibility of variables in different parts of a program. 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 variables are limited to the block they are defined in.

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 is seen with variables declared using 'let' or 'const' inside curly braces.

Why is understanding variable scope important?

Understanding variable scope is crucial for avoiding naming conflicts, managing memory efficiently, and ensuring that your code behaves as expected.