Difference between ref and out keyword

Ref : The  ref  keyword is used to pass an argument as reference means that when the value of that parameter is changed in the method its get reflected in the calling method An argument that passe using the ref keyword must be initialized in the calling method before it is passed to the called method


Out : The argument  can be passed without assigning any value to it  An argument that passed using out keyword  mus be initialized in the called methd