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[no audio]

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Hi friends, here

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we are going to discuss about indentation in Python.

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Right. Let me start that.

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First of all, what is an indent?

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See indent is nothing but a space.

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So guys, if you know some other languages like C, C++, Java,

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or some shell scripts, right,

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let's say suppose C language,

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so in C language to represent some block of code

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we are using curly braces. Now, the lines which are there between

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these two curly braces are a block. The lines which are there

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between these two curly braces,

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this one and this one, is one block. Now to represent some set

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of lines as a separate code, as a separate block of code

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we are using curly braces there.

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But in your Python you don't have something like curly braces

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to represent a block of code.

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Now instead of that

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we are using here indentations.

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We are using some space to represent a block of code, right.

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So indentations are used to represent a block of code.

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[no audio]

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Right. Let me give you simple example.

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So as of now, I don't know about Python, but just observe

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the some code.

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Let me write simple code.

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[no audio]

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So here I'm opening a program, a script called

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'indentations_usage.py', right. Very first line

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I am writing simply 'print("This is about indentations")'. Right,

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simply you are printing some string.

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Now what I am doing is 'if 3 > 1 then',

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I want to execute some two lines - 'print(

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"using if condition"), 'print("we are checking").

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[no audio]

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"we are comparing

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3 and 1")', that's it.

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Now guys see that

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I am giving some space for these two lines.

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Now, these two lines are a block of code.

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These two lines are a block of code, and this block of code

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is under this line.

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So after this line I am giving some space, equal space for

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all lines. Then these lines, even you can write 100 lines

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also with equal space. Now all 100 lines are there under this line.

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Because after this line only we are giving spaces,

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that's why all these lines are there under this line, whatever

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it may be. As of now

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we don't know about your Python, right. Just observe that.

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[no audio]

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Now these two lines are called block of code,

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and this line is there under this line.

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Now, let me save it and run this.

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Oh, sorry.

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Right. Now I am running this.

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Okay. Simply 'python',

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your script name.

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Right. You're getting some output, right.

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Just see once again your code.

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[no audio]

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Now, this is called indentation, right. Now,

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the amount of indentation is up to you,

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but it must be consistent throughout that block. See that.

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I have given same space for first line and second line. In

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case by mistake if I give some extra space or some less

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space, right, and try to run your script, and see the output

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what you are getting.

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'IndentationError: unexpected indent'. Unnecessarily you're

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providing some space, right?

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So guys whenever if you want to provide a space, right,

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so before that line you should have some condition, or some

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function name, something like that.

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As of now we don't know that's why just assume that for each and

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every line you should have same space. Unnecessarily don't provide space.

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right, not only here. Now,

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let me recheck it. First,

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I'm running. It's working.

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Now, what I am doing is for very first line

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I am going to provide a space. Very first line is some 'print'

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statement. For that

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I'm giving some space.

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If I give some space, and if I run, observe that

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you are getting an error like again, 'IndentationError: unexpected indent'

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Unnecessarily you're providing space for line #1.

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[no audio]

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Right. So to provide some space before starting your line, right,

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before that line

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you should have some logic. That logic like, with 'if' condition,

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or some function name, or some class name, something like that.

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[no audio]

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Right. Let me open your script.

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Very first line I am

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starting. If it is very first line, first of all you should

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not provide any space.

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Let me delete that space. Even

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[no audio]

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let me do one thing.

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Now forget about your block of code. Now, I'm writing something

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here, 'print'.

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[no audio]

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"we are okay with indentations".

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[no audio]

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Now for this 'print' statement, right, if I write some space

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then your Python won't accept. In case if this line is under this line,

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I mean under this block of code, then for this line

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you have to provide same length of space, but we are providing

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only one space.

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In case if this line is also under this block, then you have

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to provide same space here.

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But my assumption is there is no relation between this block

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of code and this line, and this is I am assuming this is a separate line.

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If this is a separate line, you should not provide a space first.

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If you want to provide a space, before this line you

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have to write again something, like some condition name, some

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condition, or some function name, or some class name.

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[no audio]

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Right. So as of now, we don't have anything like condition, function,

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and classes. Don't provide a space. That's it.

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So simply guys as a learner don't provide any space before

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starting your line.

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Okay. That is nothing but simply about your indentations

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of your Python.

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[no audio]

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Right. That's it. Now it's working perfectly.

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[no audio]

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So guys, final point just remember that this is very important,

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don't include an indent unnecessarily.

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Right. Okay.

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Okay. Thank you for watching this video.

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[no audio]