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At a is a structure that contains a group of elements we can declare an array using parentheses.

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And inside those parentheses we are placing arrays elements best would be to show this on some example

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for example here.

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We are creating a which contains three elements 1 2 and 3 we can from by script easily call each element

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of an array using dollar sign followed by curly brackets and inside of curly brackets we specified a

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name.

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In our case our essay is called at a.

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And then inside square brackets we can specify index of an array.

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Please note that the first element of an array has index 0.

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Second element of an array has index 1 and so on.

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Here we have other choices how to display information about a.

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So if we want to display first second or first element of an array we are using indexes.

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If you want display all items in a we are using inside square brackets at the symbol or asterisk.

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But as we already discussed in lecture about in the NOW field separator asterisk displays all items

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of array delimited by first character of Internode field.

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Separate them we can also display all indexes in the array and we are doing this by prepending exclamation

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mark before.

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Add a name and inside square brackets we need to specify a symbol or asterisk.

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Very good feature would be the possibility to display how many elements do we have in a form that we

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are prepending hash symbol before as a name and as usual inside square brackets we are using as symbol

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or asterisk we can also display the length of item 0 and 0 represents first element in a.

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It is basically a line of first element in a.

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And we are doing it by prepending Eshe before a name and inside square brackets we are putting a index

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number.

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So if we want to display a length of cert item in a we should put the number two inside square brackets.

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So now let's write some script to see it in action.