#------------------------------------------------------------------------------
#  Time.py
#------------------------------------------------------------------------------

import time

def mySum(R):
   sum = 0
   for x in R:
      sum += x
   # end for 
   return sum
# end mySum()


#-- main ----------------------------------------------------------------------


n = 10_000_000        
testRange = range(1,n+1) # [1,2,3, ... ,n]
format_string = "{0} (time taken = {1:.5f} seconds)"

# time mySum() on n numbers
t0 = time.time()
my_result = mySum(testRange)
t1 = time.time()
print( "my_result    = "+format_string.format(my_result, t1-t0) )

# time the built-in sum() on n numbers
t2 = time.time()
their_result = sum(testRange)
t3 = time.time()
print( "their_result = "+format_string.format(their_result, t3-t2) )