# Operators
Computers are incredible at doing math calculations. Now that we have learned about variables, let’s use them with arithmetic operators to calculate things!
Python has the following arithmetic operators:
+ Addition- Subtraction* Multiplication/ Division% Modulo (returns the remainder)
score = 0 # score is 0
score = 4 + 3 # score is now 7
score = 4 - 3 # score is now 1
score = 4 * 3 # score is now 12
score = 4 / 3 # score is now 1.3333
score = 4 % 3 # score is now 1
print(score) # Output: 4
And take a look at this code that calculates a 20% tip by calculating the total and then multiplying by a float (decimal number):
pizza = 2.99
coke = 0.99
total = pizza + coke
tip = total * 0.2
print(tip) # Output: 0.796
Another way to write this is using parentheses to calculate the total and the tip in one line of code:
tip = (pizza + coke) * 0.2
In Python, parentheses have the highest order of operations.
Now that we’ve learned about the basics of variables and operators, let’s put them to use!
# Instructions
Create a temperature.py program that converts a temperature from Fahrenheit (°F) to Celsius (°C).
Google the current temperature of Brooklyn, NY (where Codédex is based) in °F.
Use the following formula and write it out in Python:
\[Celsius = {Fahrenheit - 32 \over 1.8}\]
Print out the converted temperature.
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