Velofel ZA For example you can call the seal method

Velofel ZA For example you can call the seal method to get the sealing of a number. So if you pass 2.9 here and then print the result we should see 3. Let me delete all this other code here. Alright, let's run this program there you go. So we get 3. Another useful method is the floor method, so let's give that a try, floor of 2. 9. What do you think we're going to get? We get 2. Now there are so many functions built in this module and we don't really have time to go through all of them. But let me show you how we can learn about them on your own. Open up your browser and search for Python 3 math module. Make sure to add the version python 3. Because the math module in python 2 is slightly different from the math module in python 3. So python 3 math module, now here you can see the documentation of this kind of module let's go let's have a look, if you scroll down, we can see the list of all the functions and their explanation. So as an exercise I encourage you to have a quick look at this documentation. See what functions are there for you in case you need them. In this tutorial, I'm going to talk to you about if statements in Python if statements are extremely important in programming and they allow us to build programs that can make decisions based on some condition. So if some conditions are true we're going to do certain things, otherwise we're going to do other things. Here's an example. Over here I've got this text file with a bunch of rules for our program. If it's a hot day, perhaps we want 

  

Velofel South Africa (ZA) to tell the user it's a hot day, so make sure to drink plenty of water. Otherwise, if it's cold, so here's another condition if this condition is true we're going to tell the user it's a cold day so where warm clothes. And otherwise if it's either hot or cold, we want to tell the user it's a lovely day. So let me show you how to write a program that simulates these rules. So, back to our program here, we start by defining a boolean variable is underline hot. We set this to true. Next, we add an if statement, so if, here we need to add a condition, in this case we're going to use our boolean variable. So, is underline hot. So if this values to true. Then we're going to do certain things. In this case, we want to tell the user hey it's a hot day, drink plenty of water. So, back to our program after our condition we add a colon, now, note that when I press enter pycharm automatically indents our cursor. Now any code that we write here will be executed if this condition is true, otherwise it will be ignored. Here is an example. Let's write a print statement, here I'm going to use double quotes because I want to use an apostrophe in our string. So, it's a hot day. Now let's press enter you can see the cursor is still indented, that means we can write more code that we executed if this condition is true, in this case let's say we don't want to write any extra code, so to terminate this block we need to press shift and tab, now the cursor is at the beginning of the line so lets write a print statement with a message like enjoy your 

Velofel South Africa . Now when we run this program, because this condition is true, you're doing to say this message followed by this second message, take a look, so run, there you go, it's a hot day enjoy your day. But if I go over here and change this boolean value to false and run the program again, our first message disappears and we only see the second message, enjoy your day. So this is how if statements work. Now back here we can add another print statement let's say drink plenty of water. Now because this spirant statement is also indented it will be executed if this condition is true. So I'm going to revert is hot to true and run the program one more time. There you go, so it's a hot day, drink plenty of water, and enjoy your day. Alright now let's add a second rule here, if it's hot we're going to execute these two lines, otherwise if it's not hot we want to print a different message. So here we are moving an indentation and typing els colon. Now when we press enter once again our cursor indented so the code that we write here will be executed if this condition is not true. So here we can print it's a cold day, print, where warm clothes. Now let's run our program one more time. So we get the message about a hot day followed by enjoy your day. You don't see any message about a cold day. Now if we go back here on the top. And change this boolean value to false and run our program we see different set of messages. It's a cold day wear warm clothes and enjoy your day. But there's a problem with our program