a = 5
print(a)    
a = 10
print(a) #output: 10
print(a + a)
a = a + a #reassign it
print(a)
print(a + a)
print(type(a))
a = 20.1
print(type(a))

my_income = 100
tax_rate = 0.1
my_income = my_income * tax_rate
print(my_income)