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# how to print?
# but first thing, first. This is comment in my code using # (hash symbol) at the beginning of the line!
# don't forget to comment your code, it is important!
print('hello! my name is Anne.')


    

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# how to use variable?
# if I want to print multiple time something for example
my_name = 'Anne'
print('hi', my_name)


    

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?print


    

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print('hi', my_name, sep=',')


    

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# Everyone's happy? Questions?


    

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# four simple data types: integers, floats, booleans, and string of characters


    

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# strings
my_name = 'APajon'  # is a string
print(my_name)


    

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# you can also check its type
type(my_name)


    

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# you can use different quotation ' " """
my_name = 'Anne'
my_family_name = "Pajon"
my_address = """11 Dream Street
Blue planet
"""
print(my_name, my_family_name)
print(my_address)


    

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some_text = 'my name's Anne'


    

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# concatenate strings together
print(my_name+my_family_name)


    

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print(my_name+10)


    

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print('23'+'5')


    

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# integers
i = 2
j = 5
i+j


    

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type(i)


    

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my_age = '23'
print(type(my_age))
my_age_in_10_years = int(my_age) + 10
print(my_age_in_10_years)


    

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# floats
x = 3.2
x*i


    

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x/5


    

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y = 2.4e3
print(y)


    

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type(y)


    

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i = 2
print(i)
i = float(i)
print(i)


    

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# booleans
print(True)


    

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print(False)


    

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type(True)


    

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?type


    

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?print


    

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print(i, j, y, sep=',')


    

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print(i, j, y, sep='\t')


    

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# undefined
empty = None
print(empty)


    

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# basic arithmetic
x = 3.2
y = 2
x+y


    

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x-y


    

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x*y


    

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x/y


    

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# be careful with division if you are using python 2!
2/3


    

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2.0/3


    

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float(2)/3


    

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# counting things
i = 1
print(i)
# do something first time
i = i + 1
print(i)
# do something else second time
i = i + 1
print(i)
# third time


    

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# there is a shortcut for this notation
i += 1
print(i)


    

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print(i)
i *= 2
print(i)
i -= 4
print(i)


    

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# do this exercise in a new notebook
# 1. download the python file and run it on the command line
# 2. python --version§§
# 3. add comment and change print statement
# 4. rerun


    

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cristian_age = 56
anne_age = 45
presenters_avg_age = (cristian_age + anne_age) / 2
print(presenters_avg_age)