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Hello and welcome to this lecture.

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In this lecture I'll be talking to you about strength.

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What are strengths in Ruby and in most other programming languages.

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Strings are a sequence of characters or a group of letters strong together so you can look at a string

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or you can think of this string as printed letters strung together on a banner.

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Also for the programming language to know that you are referring to a string all strings you must enclose

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them in quotes.

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So strings must be enclosed in quotes.

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You can either use single chords or you can use the quarter but you can't mix them.

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You can start with a single and end up with a double and vice versa.

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So some examples of strings include hello world chocolates you name it.

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So you can see they all enclose in quotes so you can add a single or double quotes.

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There's a lot you can do with strings or let's play around with some of the things you can do with strings.

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Some will open interactive UBE Ruby angle and go to start our program click on my ruby folder and then

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click interactive Ruby.

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If you are on a Mac you can just type in.

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Hi.

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Are a B in your terminal.

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I feel on the Linux type in harrowby in your shell and that should give you access to the interactive

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roub you can do all sorts of things to string So let's start by multiplying a string.

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So I'm going to type P inputs if I don't use puts it doesn't remove the quotes and puts type in the

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name of the drink.

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I am going to and typing.

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Chocolate.

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Chocolate.

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Chocolate K and then a multiplier that by 5 so bizarre.

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Well I say I want the word chocolate displayed five times on the screen.

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A price ponytail you can see is displayed it you can see there or like chucked together.

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There's no room for each of them to breathe.

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So the reason being is that I didn't leave a space between the quotes and the first letter of chocolate.

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So let's try that again.

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So who do puts followed by quotes and then do a space this time before the chocolate.

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Okay.

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See here.

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Well.

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And then put the other quotes.

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Then this time the multiplication times 5 enter.

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You can see there are spaces so they can breathe now.

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So is always important.

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Bear that in mind if you want gaps or spaces of paper between your strings and you when you his enquires

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make show you leave a gap.

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Mike have done here.

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Now you get them more jammed together like they have.

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Like I've done here.

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Alright so that's one way of using strings.

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Ken what if I had them together.

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He can also add strings together so I can add two string through the first ring.

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B c Hello.

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And then I add a plus fine because I'm adding two strings together because I want them and one there

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to be some space between the string so I'm going to use empty quotes so to empty quotes which means

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it will create some space and then I use the plus side to add the other shrink and I lost time being

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bought a presenter.

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That should give me hellowallet a go.

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You can see the quotes I've used here.

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This code is created the space in between.

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So that's how you add strings together in some programming language is called concatenation.

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When you add strings together.

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Another thing you can do with strings.

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You can find out the length of this string.

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So for example typee Puts A C U demming.

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Dot let

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a press enter.

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That will give me tells me that you there me is 7 characters.

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All right so you got one two three four five.

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He counts the space as a character.

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I left this space here a leftist base here so hennessey's got 7.

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So take note here when you include the space.

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It also counts is where any spaces between big quotes are also regarded as character.

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They are counted as well.

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Let's try a few more.

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Side type pain points are now do.

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Hello.

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In lower case.

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So if I want to convert that to uppercase I do a dot.

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And do you.

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P case.

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And that will come about.

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Or that to upper case.

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Okay if I want to do a reverse do puts an end to b.

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Hello

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fi I want to convert that to lower and do a down case.

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Pin down

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enter and that converts it to Louis.

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If you enclose pull strings around numbers programming language also treat it as the strengths if for

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example if I do puts Do as I do quotes and typing to do space time 5 or 6 time it's a trait that has

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two to the power of six.

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So give me 2 6 types because he's treated as a string.

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So by percentile.

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You can see that is giving me 2 6 times so it treats it has strings to be careful what for for that

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as well.

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I'll try one more thing to say for example you are trying to put something that was caught up Prospero

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freeze it say for example if I see you typing you

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are awesome.

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So you need to use the escape.

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I explain this in a minute.

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You are awesome

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for watching this video.

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Okay.

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And uh Precentor.

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Ms.

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Casey you are awesome misdoubt the prossed fee where you are using a process to fees you mossies a backslaps

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and the backslap physically is an escape evil escape me character without doubt you wouldn't be able

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to display detectors correctly.

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So let me try that again.

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So do puts men then two quotes.

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I'll see you back.

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That's the apostrophe.

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You are awesome.

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Press Enter.

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Okay now you are awesome.

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Without the backslaps I won't get the apostrophe here will not work.

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So bear in mind.

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Because were you using quotes and using that prossed a fee as well within the string.

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You must choose an escape for the apostrophe to show up in the output.

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So this so much you can do with.

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So I encourage you to practice on the ruby website you can see some examples there and just play around

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with what with the strings.

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So that's it for this lecture.

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Many thanks for watching and bye for now.