"Global" and "Local" Variables

Question

What’s the defferent between Global variables and Local ones?
I heard that using Local variables is faster than using Global ones.
Places they are saved are different?

Answer 1

A global variable is avaliable throughout the whole code.
A local variable is only avaliable in the function that it is in.

Answer 2

In "func" block, if it outputs a ,then "local" is displayed, right?

Answer 3

Marat Khudaiberdin did you mean var a instead of car a?

Answer 4

OK. I see.
I’ ll be careful about the lifespans of variables !

Answer 5

A global variable is accessible from anywhere in the code (in any blocks). And the local variable has a local scope, means it is only accessible in the code block where it is declared. But languages has different methods to declare a global variable from a local scope.

Answer 6

This code from a C quiz question is a good example of global and local variables both of the same name i
https://code.sololearn.com/cp4Z6UtRgH2z/?ref=app

Answer 7

Oh, PHP has such a defferent rule? There are various features among the languages...

Answer 8

Wow! I didn’t know that.

Answer 9

You can cite to global variables anywhere in your code (except for PHP)

Answer 10

One doubt. Should we have to save a file called someexample.php...what should that file contain

Answer 11

Global belongs to whole code but local is belongs toy present In the {} function