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Mathematical operations

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aren't everything though.

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We can also work with strings.

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So with text in our JavaScript code.

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And I want to show this, as well.

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Here, I'm logging a value again,

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but now I'll log the result of adding two strings together.

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Let's say "Max" and then "Schwarzmüller,"

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which is my last name.

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Now here, I'm using the plus operator,

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but I'm not using it on numbers as I did it before,

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but instead on strings,

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and that will work.

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If I save this, you see this as a result.

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The strings have been concatenated.

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That's how we call this.

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You can use the plus operator on strings

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to combine them into one string.

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Now, here we don't have any blank or white space

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between these two words that have been combined

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because we didn't add any here in this operation.

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If we would want one,

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we would have to add one like this maybe.

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And that's how we then would get a blank

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in that final string as well.

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So you can use the plus operator on strings as well

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to concatenate those strings.

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You can't however, use the minus operator.

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So maybe you would think that this could work

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and it should maybe return "M" as a result,

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but that is actually not what will happen.

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Instead, we get NaN as a result,

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and that's now not a special text,

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but instead, this is a special type built into JavaScript,

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which means "not a number."

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And you get this type

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whenever you perform a mathematical operation

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on values where JavaScript then is not able

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to yield a number as a result.

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And in case of the plus operator, there is an exception.

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This is allowed to work on strings,

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but for minus, the times operator,

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the division operator, and the modulus operator,

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all these operators can really only be used on numbers

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and not on strings.

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But concatenating strings is a common task

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and therefore, something you should know.

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And again, just as before,

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here, I'm doing it in that place.

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I am not using any variables.

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Of course,

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we could store these individual strings in variables

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and then combine these variables,

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or also store the result of this in a variable,

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and then use that variable.

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I'm just not doing that here

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because I'm not using these values

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or the result of this concatenation anywhere else

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in this code.