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Let's talk about another property which is called length.

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So let's comment out.

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This one's to avoid a lot of console.log.

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So let's have a nice comment here and call it as string length.

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Perfect.

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So what is it?

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Well, the length property retains the number of characters in a string, and the length property of

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an empty string is always zero.

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So what does it mean, actually?

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And what are some of the use cases here?

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So let's say that we have an application and we want users to register, but upon registration we want

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a user to enter, for example, user name, let's say ten characters or five characters long.

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In that way we are going to use the land property to check how many characters are present in a certain

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string.

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So let's see.

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Let's declare a variable const and let's call this one as last name is equal to.

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John Yeah.

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So how can I know or how many characters present in this particular string?

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And for this one is easy.

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You can count one, two, three, four.

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So let's allow JavaScript to count for us.

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So let's declare variable call results is equal to last name.

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And then on that we have the proper record length.

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This is not a method, but instead it's a property.

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So let's console.log the results and see the value we have.

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Indeed we have four.

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So let me show you one trick about this length property.

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It takes whitespace into consideration.

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So let's say that I have some spacing around this name.

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So if I save it now and see that I have five because it has counted the whitespace as well, if I have

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a lot of spacing to that, we see that it has increased to 12.

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So some sometimes if you are taking some data from users, sometimes users mistakenly provide some whitespace.

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So let's say that in your application you want to have, let's see, at least five characters, okay.

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Long, but the user indeed entered four characters but always said, oh, I entered five characters.

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But application says that have entered 12 characters not knowing that the user didn't count the whitespace

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into consideration.

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So as a developer, how can you solve it so we can solve it using another method called train, we get

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back into that.

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So the takeaway here is that we use length to know how many characters are present in a string and it

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takes whitespace in into consideration.

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All right.

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So in this video, let's have our first coding challenge.