Definition of stepwise refinement

Describe four different kinds of stepwise refinement.... | Filo

The intName method in the "Problem Solving: Stepwise Refinement" sectionaccepted arguments < 1,000.Using a recursive call, extend its range to 999, 999. For example an inputof 12, 345 should return "twelve thousand three hundred forty five".Note that some number names may have an extra space at the beginningand/or end.import java.util.Scanner;public class IntegerNameTurns a number into its English name.@param number a positive integer < 999,999@return the name of the number (e.g. "two hundred se