# notes sent to me from a student because I accidentially forgot to save mine... oops!

#!/usr/bin/env python
# coding: utf-8

# In[25]:


# Section 2.7 Calculations
# Math Operators
# + is addition
# - is subraction
print(3+5)
print(5-3)
# * is used for multiplication
# / is for division
print(3*5)
print(15/2)
print(6/2)
print(5/3)
print(-5/3)
#
# // is division for integers
# // is wierd. It goes to the next integer to the left.
print(4//2)
print(5//3)
print(-5//3)
print(float(4/2))
# int / and // can produce different values!
print(-11/7) #This is a float
print(int(-11/7)) #This is a float typecast to an int
print(-11//7) #This is an int
#
# % is a modulus (remainder). Behaves in the style of clock arithmetic.
print(5%4) #putting 5 into a modulus of 4 produces 1
print("5%2=", 5%2)
# % never use a modulus that is not an integer unless you figure out how it works. 
# % produces a number between 0 and the modulus
#Exponentiation
# print(5^2) does not produces exponentiation. Use **
print("5^2=",5**2)
print("squareroot(2)=", 2**0.5)
#
#Can use variables in calculations
pizzas=5
hours=2
print("pizzas/hour=", pizzas/hours)


# In[46]:


#Given a price calculate the sales price with a 10% tax for any price.
#listed_price=float(input("What is the original price of the object? "))
#taxpercent=float(input("What is the percent tax on the object? "))
#print("The total price is $", listed_price+(listed_price*(taxpercent/100)))
#print("The tax is $", listed_price*(taxpercent/100))


# In[48]:


#Order of operations
print(2+4/2)
#Left to right PEMDAS convention works for addition/subtraction and multiplaction/division.
print(2**2*2)
print((3**3)**3)
print(3**(3**3))
print(3**3**3)
#It does not work for exponentiation, which reads from right to left.