#------------------------------------------------------------------------------
# LinearSearch1.py
#------------------------------------------------------------------------------

def LinSearch(x, L):
   """
   returns the first (i.e. leftmost) index i in L for which L[i]==x
   """
   for i in range(len(L)):
      if x == L[i]:
         return i
      # end if
   # end for 
   # if this line is reached, None is returned
# end LinSearch()


# function main() -------------------------------------------------------------
def main():

   target = 'eight'
   words = ['one','two','three','four','five','six','seven','eight','nine','ten']

   position = LinSearch(target, words)
   print(target, 'found at position', position)

   target = 50
   numbers = [3, -2, 50, 78, 5, 50]

   position = LinSearch(target, numbers)
   print(target, 'found at position', position)

   target = 12
   position = LinSearch(target, numbers)
   print(target, 'found at position', position)

# end main()

# closing conditional ---------------------------------------------------------
if __name__=='__main__':

   main()

# end