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Hello and welcome to the goal and programming language course in the previous session, we talked about

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creating and initializing a map variation by the make function and indecision decision.

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We want to talk about the other maps concept.

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Map links to determine how many items key value pairs a map has use built in land function.

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Now you can see the sample go to this school to illustrate how to use built in land function.

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For the example, creating a map using make function twist or employees marks and sit astride times

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as index and sit in type as value, vash and fluid equals make function math.

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This global markets sit history as index and sit end as value.

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Now go to the next line and initialize the Mac and Louis index, for example, keen and value is 10.

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Go to the next line, and Louis, he is gene values 20.

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And in the next line and another element employee.

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Rather.

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And value is 30.

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And create a game empty map.

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Go to the next line and Chloe

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Beast.

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Colin Equals make and map key is strange, and when is it now, Yvonne, to see length of to my variable

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by the land function, first variable initialize and second variable don't initialize.

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Go to the next line FP lend function for the employee and go to the next line if the using land function

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for the employee list.

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Reformat the code, save the project and execute the program.

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Now we can see the output for employment, the length is three because it has three values and for the

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employee list, the length is zero because it doesn't have any value and the learned function in return

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zero for an undisclosed month.

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Now go to his line and continue.

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Accessing items, you can access the items of a map by referring to its key name inside Esquire brackets.

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Now you can see the sandpit.

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Go to this school to illustrate how to access map items.

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First, clear the last quote.

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Save the project, for the example, creating a map twist to a person's idea and sit and type as index

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and string type as a value vase in pillowy equals map type index is in and value index is a string and

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initialize the variable.

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For the example, a hundred other

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key and 200 dollar value is gene.

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And third element 300, Colin, and value is rather diplomatic coup and go to the next line.

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Now you access the map items by calling in the Esquire brackets.

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So do the following if he

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said name of map and put the selected index in square brackets for the example employee escort brackets

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and set the index for the Example 100, reformat the code and save the project, then execute the program.

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Now we can see the output.

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We put an index in square brackets and get the value of that index.

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In this case, we set the hundred as index and the return chain as value.

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Now we could define the map and access to its items in order not to prolong the time of decision will

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finish it, and we will continue the content in the next session.

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Goodbye.