Simple types, variables

a = 4
c = -10

# binary notation (base 2)
b = 0b010

# octal notation (base 8)
o = 0o011

# hexadecimal (base 16)
h = 0x1CF0

a = int("1")  # base 10
a = int("111", 2)  # base 2
a = int("70", 8)  # base 8
a = int("16", 16)  # base 16

print(10 + 3)
print(10 - 3)
print(10 * 3)
print(10 / 3)  # float division
print(10 // 3)  # integer division
print(10 % 3)

b = bool("1")
b = False
b = True

# define a variable nb_students that is not yet defined
nb_students = None
# code that update nb_students

a = None
print(a is None)
print(a is not None)

True and True

True and False

False and False

True or True

True or False

False or False

# float
a = float("1")
a = 1.234
a = 1e2
a = -1e-2
a = 0.2

# complex (2 floats)
c = complex("1")
c = 1 + 2j
print(c, c.real, c.imag, c.conjugate())