What is the difference between apex command link and apex output link in Salesforce?

Hello Shariq,

apex:commandLink:
A link that executes an action defined by a controller, and then either refreshes the current page, or navigates to a different page based on the PageReference variable that is returned by the action. An <apex:commandLink> component must always be a child of an <apex:form> component.

eg.
<apex:commandLink action="{!save}" value="Save" id="theCommandLink"/>

apex:outputLink:
A link to a URL. This component is rendered in HTML as an anchor tag with an href attribute. Like its HTML equivalent, the body of an <apex:outputLink> is the text or image that displays as the link. To add query string parameters to a link, use nested<apex:param> components.

eg.
<apex:outputLink value="https://www.salesforce.com" id="theLink">www.salesforce.com</apex:outputLink>

Hi

Apex:outputLink: A link to a URL. apex:outputLink component is rendered in HTML as an anchor tag with an href attribute. Like its HTML equivalent, the body of an <apex:outputLink> is the text or image that displays as the link. To add query string parameters to a link, use nested <apex:param> components.

Example:

<apex:outputLink value="https://www.salesforce.com" id="theLink">www.salesforce.com</apex:outputLink>

apex:commandLink – A link that executes an action defined by a controller, and then either refreshes the current page, or navigates to a different page based on the PageReference variable that is returned by the action.
An <apex:commandLink> component must always be a child of an <apex:form> component.
To add request parameters to an <apex:commandLink>, use nested <apex:param> components.

<apex:commandLink value="Google" action="https://www.google.co.in"/><apex:commandLink value="Delete" action="{!dodelete}">
<apex:param name="eid" value="{!E.Id}" assignTo="{!rId}"/>
</apex:commandLink>

Thanks