help me explain please

To my understanding:
Local variable is a variable defined in a method/function, whose scope is limited to that method/function.

Global variable is a variable that is defined in a class, outside any method/function. Its scope span across all the method of the class and any other class that extends that class.

Static variable is a variable that can be called without referencing it with an object of the class. If it is to be called in another classB that inherits from classA then className.variableName is used as reference.

So the declaration.....
Local variable is declared in a method/function.
E.g public void decl(){int x;}

Global variable is declared in a class but outside any function. Not even inside main function.
E.g int x;

Static variable is the same as global variable when it comes to declaration except that the keyword static will be added when declaring it.
E.g static int x;

Global is declared outside the method/function. While Local is declared inside the function/method. Static variable gets memory only once in the class at the time the is class loading...

Meaning the global variable can be accessed anywhere within the class, local variable can be accessed only within the method and meaning not accessible outside the function that it is being declared. And static variable can be accessed in static method.

A local variable is declared within a block of code and not visible outside this block.

Example:

function Sum()
# ―――block of code starts here
var a = 3；
var b = 5；
var sum = a + b；――used locally only

Print(sum)；

#―――block of code ends here

A global variable can used in different blocks of codes that are within the class. Usually declared on top of all the blocks that can see it.

Example：

class MyClass
#
var a = 3；
var b = 5；

function Add()
# ―――block of code starts here

var sum = a + b;――assessed globally

Print(sum)；

#―――block of code ends here

function Subtract()
# ―――block of code starts here

var diff = a - b；――accessed globally

Print(diff)；

#―――block of code ends here

#


A static variable is declared with the keyword static and can be accessed, without creating an instance of the class where it is declared.

Example：


class MyClass
#
static var a = 3；
var b = 5；
#

class Tester
#
MAIN PROGRAM
#
var staticVarUsed = MyClass ％ a;
Print(staticVarUsed)；
Read；
#

#