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Welcome back in the last video, we looked at if statements and I wanted to give you another example

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of if statements and this time with a different type because we used integers and we compared integers

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and you can even see that it says I should change that to a when statement.

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So is simplify this expression.

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And if I hover over it's a cascade, it should be replaced with when and I told you that we would look

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at when expressions in this video, but we're going to do that in the next one because I want to do

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a little more on if statements because, for example, I want to create this variable called name and

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I'm going to set the value to Dennis.

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So now I want to show you how to use if statements with strings and other data types.

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So if name is equal, equal Dennis, then.

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I want to write something like Welcome Home.

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So print line.

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Welcome home, Dennis.

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All right.

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But else I want to say, who are you, for example?

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OK, so this is something that we can also do, so we can check strings as well.

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What's important is that whatever is within those brackets can be either true or false.

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So it has to be a Boolean that will be the result of whatever is within the brackets.

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So the simplest form would be we have a variable here is rainy is true, for example.

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So now it's raining and now I can check if it is rainy is true, then do some cold so print and it's

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rainy, even though here of course, it's complaining.

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Or it says the condition is always true.

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So is rain will always be true because it's a vowel, so it can never be changed.

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We changed it to Avar than it at least can be changed.

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So now this warning is not there anymore, but you can see this is another way of doing if statement.

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So the important part is that whatever is within the brackets can be either true or false.

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So is a Boolean in the end.

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Another important aspect of if statements that I haven't covered yet is the following if we look at

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this if statement here, we can see that it says age greater equal to one.

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And here it says age greater equal 18.

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So this statement is true if that statement is also true, or let's say this statement here is true

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if that statement here is true.

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So what this means is that even though the statements on their are also true, we first of all, look

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at the first one.

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And if that one is true, then we ignore all the other ones.

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That is something very important about if statements, because they always only look at the first expression.

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If it's true and if it's not true, then it starts to look at the next expression.

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Then at the next one.

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And if none of the expressions are true, then the ALS blog is executed.

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So it's not like all of them will be executed if the age is greater than 16, because all those three

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would be true, right?

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But only the first one, and that is generally true for if statements.

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So it always goes top to bottom, which means first line to the last line of this statement.

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And this is a whole if statement blocks.

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So they're all interconnected to each other, which means that this ALS block really depends on all

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of the other.

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If an 11 blocks to be false.

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Otherwise, it will never be executed.

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All right, so I'd say let's go to when expressions and see how they are different too, if statements,

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so see you in the next video.