Original subtitles

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Throughout this course,

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we'll be getting you involved in a lot of these interactive coding exercises.

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And the idea is that you are not just sitting here watching me talk, that you are

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actually putting everything you're learning into practice. That way

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it actually becomes your own.

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These coding exercises are great because we can give you instructions and show

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you what should happen if you write the correct code, what it needs to do,

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and you'll be able to write your code as well as see it run in the console.

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And it's through a lot of these exercises that you're going to level up and

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you're going to become a better coder. So in order to enroll,

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head over to this URL, and if you don't want to type it in,

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you can head over to the course resources and you will be able to get a direct

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link there.

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And the first thing I want you to do is to go ahead and click on the fork

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button. Now,

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the important thing here is this is the output that we want to see down here in

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the console. And when you hit run, this is what should happen. Now,

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remember that I want you to have exactly the same characters printed out as I've

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got here, including where the spaces are, including the symbols,

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like these single quotes, et cetera.

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Now is the time for you to head over to this challenge and try to complete it.

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Pause the video now and complete this challenge.

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...

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All right. How did you get on?

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I really hope that you gave this a good go because it's in these moments where

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you're going to be learning to code. Unfortunately,

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no amount of listening to me talk is actually going to give you these skills.

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It's only when you actually try it out and get the computer to do the thing that

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you want it to do. That's when you become the master of the computer,

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also known as the programmer. So in this case,

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the instructions are pretty simple.

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We have to use what we learned about the print statement to output these three

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lines. And notice how in this gif,

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the lines are printing out in separate lines.

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This one gets printed, then this one, then this one.

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But because it happens so fast,

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it seems as if they're getting printed as a single block.

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So we're told to write our code below this line.

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And we know that in order to print something,

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we use the print function with a set of parentheses. And inside the parentheses

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is where we tell it what we want it to print. So in the first instance,

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it's day one, a space,

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then it's... now it's really easy to make spelling mistakes,

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but I really encourage you to actually type out anything that you put into your

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code rather than just simply copying and pasting it. Now,

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of course, it works exactly the same way. I could just copy and paste the code in

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here, but it's often in these cases where you make mistakes,

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like for example,

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forgetting to add the double quotes around the text that you want to print.

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I really recommend just typing out the code for practice whenever you are doing

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these code challenges. Now,

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the last line that we want to print is a little bit complicated.

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It's almost like print inception,

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because what we want to print is this function.

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This is how we write our function.

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And that has to go inside here, inside a set of double-quotes.

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So let's open up a double-quote and then write our print statement.

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And in this case, I'm actually using a single quote

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and I'll tell you just in a little moment why that is.

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So let's add that single quote and finally, the closing parentheses.

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This now is the entire code that you would need to be able to print something

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out. And when I go ahead and click run,

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you can see that the output looks exactly the same as what we've got here in the

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GIF. This is what we want. And I've now completed the coding challenge.

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Now, coming back to this single quote,

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why is it that I've got a single quote here rather than a double quote,

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which is what we've been using all this time? Well, because in Python,

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it doesn't actually care whether if you enclose the strings,

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so these pieces of texts are not to be interpreted as code inside a single

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quotes or inside double quotes.

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It is identical to the computer. This Honeybadger literally doesn't care.

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But if you had a set of double quotes and then you wanted another set of double

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quotes inside the double quotes, so for example,

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if I replace this with double quotes, you'll see that already,

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the syntax highlighting is already screaming out to us. There's something that's not

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quite right here because the colors are not the same as here where the print

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function is in a particular color,

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the parentheses are in a particular color and the text that is to be printed

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is in a yet another different color. In this case,

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it looks all jumbled up and we're getting some errors here.

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So now if I hit run, you'll get syntax errors.

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And the problem here is of course,

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this-- is of course our code thinks that the end of this string is here.

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And so it doesn't know what on earth is going on afterwards. And instead,

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it's seeing this as a string, this as a string,

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and this is being interpreted as code.

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So when we want to use some double quotes inside another set of double quotes,

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commonly you'll see people switch to single quotes instead.

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So you could, for example, write the print statement like so,

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and use double quotes if you want to print those out,

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or you can do it the other way which is what I had before

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where we use our double quotes on the outside and single quotes on the inside.

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So have a play around with that if that's at all confusing,

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but once you've tried it a few times and switched it around a few times,

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it should become clear what it's actually doing.

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How did you get on with this challenge? If you ever need to see the solution,

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it's always down here as a link.

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So if I go ahead and paste that link into my browser,

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then you'll see, word for word, the solution to each of these challenges.

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And hopefully that'll help you along the way while you're learning as well.

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So I hope you enjoyed this challenge. In the next lesson,

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we're going to get back to learning about Python and we're going to learn about

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strings and string manipulation. For all of that,

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and more I'll tell you there.