Lightning - Display Array of elements or List or Set

Display Array of elements or List or Set

To display Array of elements ot lists or set we can use iteration in lightning. 
<aura:iteration items="{!v.student}" var="a">
items -- data on which we need to iterate
var -- The name of the variable to use for each item inside the iteration
aura:iteration iterates over a collection of items and renders the body of the tag for each item

Component
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<aura:component >
    <aura:attribute name="student" type="List" default="['ABC','DEF','GHK','LMN','OPQ']" />
    <aura:attribute name="age" type="Integer[]" default="[12,23,45,56,67]" />
    <aura:attribute name="course" type="Set" default="['A','D','G','L','O']" />
    <lightning:layout multipleRows="true">
    	<lightning:layoutItem size="4" padding="around-small">
        	<aura:iteration items="{!v.student}" var="a">
                {!a}<br/>
            </aura:iteration> 
        </lightning:layoutItem>
        <lightning:layoutItem size="4" padding="around-small">
        	<aura:iteration items="{!v.age}" var="a">
            	{!a}<br/>
            </aura:iteration> 
        </lightning:layoutItem>
        <lightning:layoutItem size="4" padding="around-small">
        	<aura:iteration items="{!v.course}" var="a">
            	{!a}<br/>
            </aura:iteration> 
        </lightning:layoutItem>
    </lightning:layout>
</aura:component>
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