input: Write a function to explain how recursion can be used to solve a problem in Python. The function should describe the concept of recursion, including how it involves solving a problem by breaking it down into smaller subproblems and combining the results until the original problem is solved.
  assert solve_problem_using_recursion()=="Recursion is a powerful technique for solving problems. It involves defining a problem in terms of itself. A recursion problem is solved by breaking it down into smaller problems, until the problem is small enough to be solved directly. The result from a smaller problem can then be combined with the result from the larger problem, until the original problem is solved. In Python, a recursive function is one that calls itself."
  assert solve_problem_using_recursion()==solve_problem_using_recursion()
  assert solve_problem_using_recursion()
output: def solve_problem_using_recursion():
      return "Recursion is a powerful technique for solving problems. It involves defining a problem in terms of itself. A recursion problem is solved by breaking it down into smaller problems, until the problem is small enough to be solved directly. The result from a smaller problem can then be combined with the result from the larger problem, until the original problem is solved. In Python, a recursive function is one that calls itself."