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OK let's briefly talk about tuples now tuples are like lists but they're not like lists.

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So lists are what we call mutable meaning that they can be changed.

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Now tuples tuples are immutable.

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They can not be changed.

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Now for this course this is the last time you're going to be seeing tuples.

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But it's important to define what they are so that you know them you know how to identify them.

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And they're just in the back of your mind as Hey I know what a tuple is.

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And that thing is immutable I can't change it once I have it.

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So let's take a look at a tuple.

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OK let's make a new line here and start a comment for you to say tuples do not change.

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And also we can put parentheses like this because remember lists have brackets tuples have parentheses.

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So we're going to say something like grades.

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Now we're going to an item that won't change.

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So we're going to define grades here as is A B C D and F which is common for the US grading system.

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And this is an example of a tuple.

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So again we have parentheses instead of brackets.

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Now if we were to go in here and we were to try to do a grades got pop for example and try to remove

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one of these.

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Not going to be possible or a grade that append we're not going we'll put it something else in here.

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This is immutable.

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We cannot change this.

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Once we have a defined so we can go ahead and print out our grades and we can say print out grades.

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It's proud to be.

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And that will work and you can see now we printed a B.

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So we have similar features or abilities that we did here.

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But we cannot change it in any way.

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So once we have this defined and set that's it for us.

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So this is it.

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I just want to quickly show you what a tuple is.

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Again we're not going to get into it at all in this course.

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But it should be defined and we should know the difference between a list which is mutable versus a

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tuple which is immutable.

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So in the next video we're going to get into looping.

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So we've already cover looping in the bash scripting section of the course but we're going to go ahead

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and get into the python version of looping as well and make some more sense of it.

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So I will get you over in the next video.