Lightning - How to read input values using attributes

How to read input values using attributes

In order to read values entered in input elements we can use <aura:attribute>. 
To get the values from the input elements we need to use below code

component.get("v.Name Of the Attribute"); 
And we need to provide the value attribute in lightning input 
<lightning:input label="Enter Amount" type="number" required="true" value="{!v.Name Of the Attribute}"/>

To set the value to the component using the attribute we need to use the following code
component.set("v.Name Of the Attribute",Value which needs to be assigned);

Component
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<aura:component >
    <aura:attribute name="aval" type="Integer"/>
    <aura:attribute name="bval" type="Integer"/>
    <aura:attribute name="cval" type="Integer"/>
    <aura:attribute name="amount" type="Decimal"/>
    <aura:attribute name="years" type="Decimal"/>
    <aura:attribute name="rate" type="Decimal"/>
    <aura:attribute name="interest" type="Decimal"/>
	<lightning:card iconName="utility:company">
    	<aura:set attribute="title">
            Calculator <br/>
            Simple Calculator
        </aura:set>
        <aura:set attribute="actions">
            <lightning:button label="Add" onclick="{!c.add}"/>
            <lightning:button label="Mul" onclick="{!c.mul}"/>
        </aura:set>
        <lightning:input label="Enter the Aval" type="number" value="{!v.aval}" required="true"/>
        <lightning:input label="Enter the Bval" type="number" value="{!v.bval}" required="true"/>
        <lightning:input label="Result" type="number" value="{!v.cval}"/>
    </lightning:card>
    <lightning:card iconName="standard:account">
    	<aura:set attribute="title">
            ICICI Bank<br/>
            Interest Calculator
        </aura:set>
        <aura:set attribute="actions">
        	<lightning:buttonGroup>
                <lightning:button label="Submit" onclick="{!c.submit}"/>
                <lightning:button label="Reset" onclick="{!c.reset}"/>
            </lightning:buttonGroup>
        </aura:set>    
        <lightning:input label="Enter Amount" type="number" required="true" value="{!v.amount}"/>
        <lightning:input label="Enter Years" type="number" required="true" value="{!v.years}"/>
        <lightning:input label="Enter Rate" type="number" required="true" value="{!v.rate}"/>
        <lightning:input label="Interest" type="number"  value="{!v.interest}"/>
    </lightning:card>
</aura:component>
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Controller: 
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({
	add: function(component, event, helper) {
        var aval = component.get("v.aval");
        var bval = component.get("v.bval");
        var result= parseInt(aval)+parseInt(bval);
        component.set("v.cval",result);
		
	},
    mul: function(component, event, helper) {
		var aval = component.get("v.aval");
        var bval = component.get("v.bval");
        var result= parseInt(aval)*parseInt(bval);
        component.set("v.cval",result);
	},
    submit: function(component, event, helper) {
		var amount= component.get("v.amount");
        var years= component.get("v.years");
        var rate= component.get("v.rate");
        var Interest= (parseInt(amount)*parseInt(years)*parseInt(rate)*12)/100;
        component.set("v.interest",Interest);
	},
    reset: function(component, event, helper) {
        component.set("v.amount",null);
        component.set("v.years",null);
        component.set("v.rate",null);
        component.set("v.interest",null);
		
	}
})

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