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Welcome back.

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In the last year, we looked at if statements, and I wanted to give you another example of if statements

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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 one statement.

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So to simplify this expression, and if I hover over it to Cascade, it should be replaced with when

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and I told you that we would look at when expressions in this video.

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But we're going to do that in the next one because I want to do a little more on if statements because,

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for example, I want to create a variable called name and 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, so print line will welcome home, Dennis.

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All right, 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 ranie is true, for example.

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So now it's raining and now I can check.

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If it is raining is true, then do some cold.

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So.

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Prindle And it's raining, even though here, of course, it's complaining or it says the condition

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is always true.

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

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If we change it to AVAR then it at least can be changed.

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So now this warning is not there anymore.

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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 statements that I haven't covered yet is the following.

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If we look at this statement here, we can see that it says Age Greater Equal 21, and here it says

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age greater, equal 18.

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So the statement is true.

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

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true.

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

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look 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, then at the next

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one.

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And if none of the expressions are true, then the 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.

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Right.

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But only the first one.

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And that is generally true for if statements.

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So it always goes top to bottom, which means first line to 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 blog really depends on all of the

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other if and elusive 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 one expressions and see how they are different to if statements.

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So see you in the next video.