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As far as data types are concerned we have so far mentioned integers strings and folks know you are

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going to learn to other data types that are least and topples both police and toppled are often referred

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to as sequences because they are sequences of objects.

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Let's start with just sort of the most important between the two.

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So let's start talking about this.

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Well this is a sequence of objects.

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These objects can be numbers streams files and many other data types.

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Let's create a list of integers.

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I'm going to call my list for a list.

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And add three digits in the list.

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Let's quickly see what we got.

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So it's all the softening digits.

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Now let each value of a list is called the least item.

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Are excessively use when automatically performing multiple actions or iterating if you like.

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If you want to add more items to Oly's you can use the append method.

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So a painless Luis of that adds a new element at the end of the list.

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We use the dot notation to apply a method to an object.

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Now all these are indexed meaning that every element of A list every item of the list has a certain

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index starting from zero.

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So for all these 2015 holds an index of zero.

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2016 has an index of 1 and 2017 has an index of two indexes are useful when we want to say certain items

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of a list.

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For instance if we want the second element we call the element with the index one.

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We arrive at least name and the index of the item we want to call the side square brackets and we get

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the second item.

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This item behaves just like an independent object.

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For example in this case we have an integer as you see now.

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So with that we were able to modify all list and we did that by having an item at the end of our list.

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Sometimes you don't want your list to be modified for some reason and in such cases we use tables to

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create a table just use the syntax so to declare these we use square brackets for tables we use drawn

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brackets.

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It is rare to use tables but in case you want your series to be immutable doubles are always there for

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you.

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So you just learn what lease tables are and more data types in the next lecture.