Get Logged User / Current user Details Using Rest Api

//Call  the function  Where You Want to use 

getUser(_spPageContextInfo.userId);

 

 // Fuction Body

function getUser(id){

var returnValue;

  jQuery.ajax({

   url: vUrl +"/_api/Web/GetUserById(" + id + ")",

   type: "GET",

   async:false,

   headers: { "Accept": "application/json;odata=verbose" },

   success: function(data) {

           var dataResults = data.d;

      //get login name 

      var loginName  = dataResults.LoginName.split('|')[1];

      var Email=dataResults.Email;

      returnValue=loginName+";"+Email;

     // returnValue=loginName;

   }

  

 });

return returnValue;

 

}