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Hey there.

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In this lecture, we're going to be discussing and learning a feature in the Lulu programming language

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called string interpolation.

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Now the word interpolation means to insert something of a different nature into something else, which

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is exactly what string interpolation allows us to do.

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If we ever need to insert or concatenate something to a string, such as a table or the name of an instance

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or any other property of an instance, we would usually have to get that value stored in that property,

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and try to concatenate it to the table using two dots, or by using the string dot format function.

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However, there is a much easier and more efficient way of inserting these things directly into our

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strings, and that's by using string interpolation.

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So to demonstrate string interpolation, I'm going to create a new server script and server script service.

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And inside of this script what we're going to do is we're going to get the player service.

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And we're going to print a message into the console when a new player joins our game.

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So we could do players dot player added connect, get that player and then we would print out in the

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console.

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This player has joined the game.

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Now.

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Usually how we would do it is we would do player dot name and then concatenate it with this string.

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Or another way we could do it is by using the string dot format function and then placing our string

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in there.

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And then we would add a directive into the string.

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And then we would pass the string that we would like to replace that directive, which would be the

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player's name.

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See this is just like really long to type out and it doesn't look that clean.

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However, using string interpolation, we can insert the player's name directly into our string, and

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it's very easy to do so.

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To use string interpolation, we can create a new string by using the Backtick key, which is located

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directly above your tab key on the left hand side of your keyboard.

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That's right, we can actually create a string in four different ways using either double quotes, single

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quotes, double brackets, or using a Backtick.

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This backtick signifies that this string can be interpolated.

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So to insert things directly into the string, we have to use a pair of curly brackets, and between

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these brackets is where our item is going to go inside of our string.

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So after these curly brackets, I can say something like this player has joined the game, and inside

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of these curly brackets I can go ahead and insert my player dot name property.

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And just like that, we have interpolated the string by inserting this property directly into the string

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itself.

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So if I were to go and playtest my game and my player were to join, as you can see, it prints out

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my name.

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Udemy.

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Lucas has joined the game, and this looks a lot cleaner than having to use two dots to concatenate

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the string together or by using the String.format function.

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It's very easy and it looks very clean and we can insert all types of values into these interpolated

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strings.

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For example, we can print out something like I can insert this value, and then I can put a number

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in here like 1000 directly into my string.

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I don't need to use the String.format function and I don't need to use any concatenation operators.

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I'll print another string out and I'll say something like.

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I can also insert any other property or expression as well.

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And inside of here we can print out some random crap like in the workspace.

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We could print one of its properties like the global wind, and then we can insert another thing by

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putting another pair of curly brackets.

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And then I'm going to put a backslash n here to move it to a new line.

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And inside of here we could print something like, I don't know, maybe the game dot lighting.

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And we get like the time of day.

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So now if we go and playtest our game, we should have all this stuff print out in our console.

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As you can see, I can insert this value 1000 directly into my string.

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I can also insert any other property or expression as well.

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There's our global wind and then there is our time of day.

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And then once more, Udemy course has joined the game.

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So as you can see, string interpolation is very powerful and very clean looking.

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And guess what?

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That's all for me for this lecture.

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I hope you learned something new.

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And I also hope you start using this awesome feature in your code.

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See you in the next one!