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Biton, global, local and non-local variables, so that means the variable, depending upon the scope,

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we shall call it as a global variable, local variable and nonlocal variable.

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So let us discuss them one by one.

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So at first we are going for the global variables available.

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We just declared outside of the function or in global scope is known as the global variable.

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This means that the global biddable can be accessed inside or outside of the function.

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So that very variable can be accessed within the function of outside of the function because it is under

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the global scope, local variables available which is defined or declared inside the functions body

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that is within the function body where defined one variable or in the local scope is called the local

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variable that is within the function body.

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The optimal has got defined or in the local scope.

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Then the variable will be known as the local variable.

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So in case a global variable, the variable will be will be defined or will be declared outside of the

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function in the global scope in case of local variables, the variable will be defined or will be declared

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within the function or in the local scope.

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What about, in that case, nonlocal variables, not local variables that are used in nested function

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whose local scope is not defined?

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So that means within the nested functions we are defining or we are using one variable which is not

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locally defined within the function itself.

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This means that the variable can be can be neither in the local nor in the global scope.

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So those variables will be known as non-local variables.

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I think the conceptual conception is not getting clear to us.

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So let us go for one practical demonstration for the better understanding.

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In this example, we have defined one X which has been defined outside of the function function one.

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So it is a global variable X and we just we just containing the string global here.

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So here within the function function one, we have defined this global X that is referring to the same

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X variable here.

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Y is having the scope local and it has got initialized with the local string, X is equal to two.

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So X is having the string global two.

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This global will be repeated twice, the string will become global, global and that will be assigned

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to the X back again.

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We are going to print the value of X and Y respectively.

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So now we are calling this function one.

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But before calling this function one and after calling this function one, we have also printing the

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value of X here.

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So here is the outcome.

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You can easily find that initially that that means before calling this function one, the global X is

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having the value globally within the function.

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When it is printing X, it is printing global, global.

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When it is printing, why it is printing local.

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And whenever we are printing this global expec again after the execution of this function, one, we

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are getting this one as global global because this particular biddable ex is having the it has been

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defined with the global keyword.

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That means it is referring to the same X that is a global variable defined outside of the function function

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one.

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So let us go for another example.

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There is a global and local biddable with the same name here you can find that it is going to fight

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is a global variable defined before the function function, too.

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And here we are defining another variable with the same name.

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But here it is having a local school.

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So local variables that access from the block where it is defined only.

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So here we have written this is the gluten.

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So print locally.

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If I print this value of a, I shall be getting 10 here.

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So before calling this function to I'm just printing the value of it.

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That is a globally I'm expecting here.

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The value of it will get printed as five and after this function to call if I print the value of it,

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there is a globally I'm supposed to get the value five here back again.

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But within this particular function, two point, I shall print this locally.

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I'm supposed to get the value estin.

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So according to our expectation, you are getting the outcome as well.

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Let us go for another one where it will be creating and using non-local variables.

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So we're here to a different one function within the function.

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One variable is defined.

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This variable is locally within the function itself.

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That means this variable is having the scope within the function itself.

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So now here we are having a nested function.

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So within the nested function, the name of the function is not supposed to define non-local variables.

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So here you can find that we have defined nonlocal X.

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That means where referring the same X, which is defined here because it is nonlocal here.

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So X has got uprated and from the inner from the inner method printing the value of X.

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So we are expecting that X will get printed as nonlocal when executing this in our method.

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So this code will get executed, X will get updated with the new string that is the nonlocal.

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So after after executing this inner method, if I print this X, so we are expecting that we are supposed

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to get nonlocal here and here you are executing the order method after completion of the definition

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of the outer function here.

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So inner nonlocal.

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So from here, when we are printing the value of X, so X has got just initialized with the string nonlocal.

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So inner colon nonlocal is coming, but as X is a nonlocal available.

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So as a result of that, this X will also get updated with the string nonlocal.

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So as a result of that, this outer colon, outer colon X will also print nonlocal here.

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But in that same code, if I make this line, only if I make this line under comment, then we are having

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this one as X is equal to nonlocal.

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So as this particular variable has gotten has got defined not without the nonlocal keyword.

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So as a result of that, its scope will be local within the innot method only.

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So that's why it do not update this global X, it will just update that local X only within this inner

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method.

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So what will happen inertly?

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Print nonlocal from the inner button will be printing this out.

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Colonics.

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It will print the string back again.

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You can find that it is printing, nonlocal and local.

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So in this video we have discussed the what is nonlocal variable, what is global variable, how to

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define nonlocal variable, how to define global variable into details and with demonstration.

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Thanks for watching this video.