# In Class Activity - Python - For loops¶

## Problem 0: For-loop over a dictionary¶

Here is a dictionary colleges that lists the city and zip (as values) for several schools in NYC (as keys).

colleges = {}
colleges['NYU'] = 'New York, NY 10012'
colleges['Columbia'] = 'New York, NY 10027'
colleges['Fordham'] = 'Bronx, NY 10458'
colleges['Brooklyn college'] = 'Brooklyn, NY 11210'


Write a for-loop to iterate over the keys and return the values, printing in this format:

# Your answer goes here
for k in colleges.keys():
print(k, ':', colleges[k])

NYU : New York, NY 10012
Columbia : New York, NY 10027
Fordham : Bronx, NY 10458
Brooklyn college : Brooklyn, NY 11210


## Problem 1: Multiplication table¶

Write a function mult_table(n) that produces the multiplication table below. Note that for each cell $$c_{ij}$$, its value is equal to the product of the row number $$i$$ and column number $$j$$, assuming they are numbered $$1,\dots,n$$.

Note, it’s not necessary to get the spacing exactly as in the example, but kudos if you do!

Here is what the output should look like when you run mult_table(10)

# Your answer goes here
x = str(x)
return x

def mult_table(n):
for i in range(1,n+1):
for j in range(1,n+1):
print("")

mult_table(10)

  1   2   3   4   5   6   7   8   9  10
2   4   6   8  10  12  14  16  18  20
3   6   9  12  15  18  21  24  27  30
4   8  12  16  20  24  28  32  36  40
5  10  15  20  25  30  35  40  45  50
6  12  18  24  30  36  42  48  54  60
7  14  21  28  35  42  49  56  63  70
8  16  24  32  40  48  56  64  72  80
9  18  27  36  45  54  63  72  81  90
10  20  30  40  50  60  70  80  90 100