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Hello and welcome to the Golang programming language course.

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In the previous session, we talked about shorthand variable declaration, and in this session we want

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to talk about the other variable concept.

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It's corp of golden variables, this core public variable can be defined as a part of the program where

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a particular variable is accessible, a variable can be defined in the class method loop or etc..

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Like C or C++ and Go Lang, all identifiers are lexical is scoped.

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The scope of a variable can be determined at compile time or, you can say, a value that can only be

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called from within the block of code in which it is defined.

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Goal and scope rules of variables can be divided into two categories, which depend on where the variables

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are declared.

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First, local variables declared inside the block or a function, and second global variables declared

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outside a block or a function go.

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Lang uses Lexicon, a scoping based on CodeBlocks to determine the scope of variable.

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Inner block can access its outer black defined variables, but outer cannot access even a black defined

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area of us.

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Now it's time to go to VSCO and create a sample project.

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Local variables features first variables that are declared inside the function or a block are termed

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as local variables.

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These are not accessible outside the function or large second.

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These variables can also be declared inside the food virus or inside the function.

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Third, these variables can be accessed by the master code blocks inside the function force.

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These variables are also termed as the blood variables.

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Fifth, there will be a compile time error if these variables are declared twice with the same name

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in the same scope.

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Six.

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These variables doesn't exist after the functions.

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Execution is over seven.

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The variable, which is declared outside the loop, is also accessible within the nested loops.

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It means a global variable will be accessible to the methods in all loops.

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The local variable will be accessible to look and function inside that function and AIDS.

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A variable which is declared inside the loop body will not be visible to the outside of loop.

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But now let's do an example.

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First, define two variables like

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that variable.

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One common granny able to bind to tight end equals 100 and 200.

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If if the value of value build one color person the variable one and go to the next line.

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If the value of variability to person.

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The

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variable to set the back is less now

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and by just this.

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Now reformat the code, save the project and execute the program, go to Terminal, Go to Project Folder

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City Valuables.

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You're a screen and go round dot back listening, let me go now we can see the output, the value of

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valuable one is 100 and the value of very able to use 200.

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Now we could define local variables in the main function, their scope of access to this variable at

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this task with open curly braces and ends with closing.

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Now, if you want to define about global variables, features first.

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The variables which are defined outside of a function or a block is termed as global variables.

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Second, these are available throughout the lifetime of the program.

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Third, these are declared at the top of the program outside all of the functions or blocks and force.

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These can be accessed from any portion of the program.

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Now, let's go to do an example about global variables.

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So first, clear the last code.

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OK.

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After the package name and in top of all, function, first we defined a variable named global variable.

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So we write that global variable by the Typekit and initialize it by 100 value.

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This is a global variable declaration.

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Now go to the main function and define a local variable, for example, the low code that you know,

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maybe the Typekit and initialize it by 200 display the value of global variable at half the value.

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Are they, Lubi, by value to the Colin person, the

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newborn value and go to the next line and now display the value of below par value of Earth Earth?

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The value of local valuable column first in the local variable.

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Reformat the court and say the project in order to better understand the concept of low cost variables

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and global variables, we define and order function like display, so we defined a function like display

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find.

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Display.

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Here we can use strong global variable, but don't use of local variables of other functions, and we

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do not access them for the example.

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Come here and display the value of global variable.

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So have you right?

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If if the value of global variable Colin first and the bank end and set variable blue by

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now calling display function in main function.

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Display before Manticore, save the project and execute the program first clear screen and run the project

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by the comment goal, one got back as Bush made that go.

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Now we can see the output first.

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He could display the local and global variable values in the main function and then calling the global

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variable in disbelief function and calling display function the main function and execute it.

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And he could display all the local and global variables value.

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In this case, we want to define a challenge.

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So first, ask a question.

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What will happen during a local variable with the same name as the of the global variable inside the

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function?

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The answer is simple, i.e. compiler will give preference to the local variable usually went to variable

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with the same name is defined.

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Then the compiler produces a compile time or modify.

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The variables are defined in different scopes.

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Then the compiler allows it whenever there is a local variable defined with the same name as that of

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the global variable, then the compiler will give precedence to the low code variable.

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We defined another program, and you can clearly see the output so clear the last code.

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First, define the global variable declarations, for example, that validate those won by the tight

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end, initialize it by, for example, five hundred now go to main function.

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And now we create a local variable inside the main function that it is same as global variable.

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Like that variable won by the tried and initialize it by 200.

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The names of both variables are the same, and it's variable one with the difference that one of them

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is global variable and the other is local value.

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Now display the value off value of it.

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If if.

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The value of Gladiator one Collins per cent de facto exclusion and said that he, the one before the

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court, saved the project and executed the program.

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Now go to Termina first floor the screen and run the project by go round like a Scotch man that go.

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Now we can see the output, the value of variable bond is 200.

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So we see that the local variable is pretty friends to the global variables.

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OK.

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We have reached the end of this session.

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I hope you take full advantage of this decision until next session.

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Goodbye.