python-introduction/basic-operators.py at master · ngalambackend/python-introduction · GitHub

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'''
Arithmetic Operators
'''

number = 1 + 2 * 3 / 4.0
print(number)

# modulo (%) operators
remainder = 11 % 3
print(remainder)

'''
Using two multiplication symbols makes a power relationship.
'''
squared = 7 ** 2
cubed = 2 ** 3
print(squared)
print(cubed)

'''
python also support concatenating
'''
helloworld = "hello" + " " + "world"
print(helloworld)

'''
Python also supports multiplying strings to form a string with a repeating sequence:
'''
lotsofhellos = "hello" * 10
print(lotsofhellos)

'''
using operators with lists
'''
even_numbers = [2,4,6,8]
odd_numbers = [1,3,5,7]
all_numbers = odd_numbers + even_numbers
print(all_numbers)

'''
Just as in strings, Python supports forming new lists with a repeating sequence using the multiplication operator
'''
print([1,2,3] * 3)


'''
EXERCISE
The target of this exercise is to create two lists called x_list and y_list, which contain 10 instances of the variables x and y, respectively. You are also required to create a list called big_list, which contains the variables x and y, 10 times each, by concatenating the two lists you have created.
'''

# x = object()
# y = object()

# # TODO: change this code
# x_list = [x]
# y_list = [y]
# big_list = []

# print("x_list contains %d objects" % len(x_list))
# print("y_list contains %d objects" % len(y_list))
# print("big_list contains %d objects" % len(big_list))

# # testing code
# if x_list.count(x) == 10 and y_list.count(y) == 10:
#     print("Almost there...")
# if big_list.count(x) == 10 and big_list.count(y) == 10:
#     print("Great!")


'''
x_list = [1,2,3,4,5,6,7,8,9,10]
y_list = [1,2,3,4,5,6,7,8,9,10]
big_list = x_list + y_list
'''