force:editRecord in lightning

This event opens the record page specified by recordId  to edit.

Syntax:

var editRecordEvent = $A.get("e.force:editRecord");
    editRecordEvent.setParams({
         "recordId": component.get("v.recordId")
     
   });
    editRecordEvent.fire();

Sample example for editing account:

COMPONENT:

<aura:component implements="flexipage:availableForAllPageTypes,force:hasRecordId">
    <lightning:button label="Edit Account" onclick="{!c.editAccount}"/>
</aura:component>

CONTROLLER:

({
editAccount : function(component, event, helper) {
    var editRecordEvent = $A.get("e.force:editRecord");
    editRecordEvent.setParams({
         "recordId": component.get("v.recordId")
     
   });
    editRecordEvent.fire();
}
})