In [29]:

    

def average(list_of_numbers):
    count = 0
    total = 0
    for number in list_of_numbers:
        total = number + total
        count += 1
    return total/count


    

In [30]:

    

l = [1,2,3,4,5,6,7]


    

In [31]:

    

average(l)


    

    
Out[31]:





4.0

In [32]:

    

l = range(50)


    

In [33]:

    

average(l)


    

    
Out[33]:





24.5

In [34]:

    

l = range(2000)
average(l)


    

    
Out[34]:





999.5

In [35]:

    

l = [-7, 9, 10, 45]


    

In [36]:

    

average(l)


    

    
Out[36]:





14.25

In [37]:

    

l = [.5, -5, 50, -.5]


    

In [38]:

    

average(l)


    

    
Out[38]:





11.25

In [ ]: