## regula_falsi_pseudocode.txt

Input: function f, negative and positive arguments xn and xp, xtol, ftol, itmax

Begin loop

  Set x to ( f(xn)*xp - f(xp)*xn ) / (f(xn) - f(xp) )
  
  Set old to | xp - xn |

  If f(x) is negative, replace xn by x
  else replace xp by x
  
  Set new to | xp - xn |
  Set alpha to new / old 
  possibly print alpha

  if new is less than xtol and |f| is less than ftol, success
  else if it > itmax, failure
  else repeat

End loop
  
Output: updated values of xn and xp and it