What is the difference between local and global variables?

What is the difference between local and global variables?

Local variables are defined within a function and can only be accessed there, while global variables are accessible throughout the entire program.

Can you give me an example of each?

Sure! A local variable might be defined inside a function like function myFunc() { let localVar = 5; }. A global variable could be defined outside any function like let globalVar = 10;.

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

If you try to access a local variable outside its function, you'll get an error because it's not defined in that scope.

Are there any best practices for using these variables?

Yes, it's generally best to use local variables whenever possible to avoid unintended side effects and to keep your code modular.