#!/usr/bin/env python
# coding: utf-8

# # range() in Python 2 versus range() in Python 3
# 
# We run same Python code in two different Ipython/Jupyter notebooks.
# The code is designed to highlight the differences in how
# Python 2 and Python 3 do range().
# The function foo, iterates through range(n),
# but quits the loop the first time the body of the loop is executed.
# So the body of the loop takes very very little time to execute.
# So long execution times for foo(n)
# are mostly the execution time of range(n).

# In[1]:


n = 10**7


# In[2]:


def foo(n):
    for i in range(n):
        break


# In[3]:


foo(n)


# In[4]:


get_ipython().run_line_magic('timeit', 'foo(n)')


# In[5]:


n = 10**8


# In[6]:


get_ipython().run_line_magic('timeit', 'foo(n)')


# In[7]:


n = 10**9


# In[8]:


get_ipython().run_line_magic('timeit', 'foo(n)')


# In[9]:


n = 10**12345


# In[10]:


get_ipython().run_line_magic('timeit', 'foo(n)')