text: 
  # Adarsha sachan
  # Calculate Fibonacci numbers.
  
  def fib(n):
    """This function returns the nth Fibonacci number."""
    i = 0
    j = 1
    n = n - 1
  
    while n >= 0:
      i, j = j, i + j
      n = n - 1
    
    return i
  
  # Test the function with the following value.
  x = 2
  ans = fib(x)
  print("Fibonacci number", x, "is", ans)
  
  
  # exercise 2 own surname Calculate Fibonacci numbers.
  # Adarsha sachan
  def fib(n):
    """This function returns the nth Fibonacci number."""
    i = 0
    j = 1
    n = n - 1
  
    while n >= 0:
      i, j = j, i + j
      n = n - 1
    
    return i
  fullname = "Sachan"
  firstname = fullname[0]
  print("My First letter",firstname)
  
  lastname= fullname[-1]
  print("My Last letter",lastname)
  
  first=ord(firstname)
  print("my firstorder is ",first)
  
  last=ord(lastname)
  print("my lastorder is ",last)
  
  x = first+last
  ans = fib(x)
  print("Fibonacci number", x, "is", ans)
  