How to navigate from one component to another in the lightning component in Salesforce?

Hi Saddam, use e.force:navigateToComponent​ for Navigate to another component

navigateToComponent2 : function(component, event, helper) {
    var evt = $A.get("e.force:navigateToComponent");
    evt.setParams({
        componentDef : "c:Component2",
        //You can pass attribute value to Component2
        //componentAttributes :{ }
    });
    evt.fire();
}