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Alright guys, now we’re going to be learning about some conditional statements in Python. So we’re going to be learning about the if-else statement, and this basically provides a way to evaluate if something is true or false, or if something is something, or it’s not something and can do something different based on which condition is true. So let’s go ahead and let’s set “check = False” and what we’re going to do with that is we’re gonna say “if check == false:” “print(“It is false”)” and I’m going to save this and this is the minimal you need for an if statement. We’re going to go ahead and run this and it’s going to say it is false because it is false. Now if we were to change this to true, and run the same code, it’s not going to do anything, and that’s because we haven’t provided and else. So if it’s equal to false it will do this otherwise it’s just going to do nothing. So let’s go ahead and drop back four spaces to where the if statement began, I guess, and that type “else:” and we’re going to “print(“It is actually equal to True”)” So let’s go ahead and let’s run the script and you’ll see that now where this is not the case, check is not equal to false, so then it’s going to do this instead. Now, what we’re going to do is this is good if you want two conditions, but what if you want more the two conditions? Between the if and else you can actually use something called “elif:” and here we actually need to supply a condition to the elif. So think of it like another level to the if statement, and think of the else as a catch-all like if none of the above are true than just do this. So if check equals false it’s gonna do that. “elif_check == “Hamburger”:” we are going to “print (“Yummm, hamburgers”)” and let’s throw another “elif_check == “Yo”:” and say “print(“Hello”)” So let’s go ahead and save this, we’re going to run it again, and as you can see check is equal to true. So it says is this true? Nope, move on. Is this true? Nope, move on. Is this true? No, move on. Okay, well the else is going to say well if none of the above is true them we’re just going to do this. So what we’re going to do right now is we’re going to set this to “check = Hamburger” and we’re gonna run the script, and you’ll see what’s happening is it’s checking this one first, that’s not true, so it moves on its like okay this one’s true so let’s just do this and then let’s get out of the if statement, so it doesn’t check any further. So that’s what an if statement is in Python and that’s necessary for what we are about to do.
