What is the difference between range & xrange?

range() – This returns a list of numbers created using range() function. xrange() – This function returns the generator object that can be used to display numbers only by looping. Only particular range is displayed on demand and hence called “lazy evaluation“. Both are implemented in different ways and have different characteristics associated with them. The points of comparisons are: - Return Type - Memory - Operation Usage - Speed range() returns – the list as return type. xrange() returns – xrange() object.