What is the difference between global scope and function scope in programming?

What is the difference between global scope and function scope in programming?

Global scope refers to variables that are accessible from anywhere in the code, while function scope limits access to variables within a specific function.

Can you give me an example of each?

Sure! A global variable is declared outside any function, like let x = 10;. A function-scoped variable is declared inside a function, like function test() { let y = 5; }.

What happens if I try to access a function-scoped variable outside its function?

You will get an error because the variable is not defined in the global scope.

Are there any exceptions to this rule?

In JavaScript, if you declare a variable with var inside a function, it can be hoisted, but it still won't be accessible outside the function.