Math

Math can be used as part of any expression in Python, in the same way math might be used in mathematics outside of computing.

twenty = 10 * 2
fourty = twenty * 2
two = fourty / twenty

List of mathematical operators:

• +
  • Addition
• -
  • Subtraction
• *
  • Multiplication
• /
  • Division
• **
  • Exponential
• %
  • Modulus (Divide integers and return remainder)
• //
  • Floor Division (Divide and round down)

Example of exponential calculation:

one_hundred = 10 ** 2

Example of modulus:

one = 13 % 4

# 4 goes into 13 three times, and 1 is the remainder

Example of floor division:

four = 9//2

# 9/2 is 4.5, rounded down is 4

Python expressions follow standard algebraic order of operations, but best practice is to put parentheses around different operations to make the order more obvious.

thirty_three = (5 + 6) * (2 + 1)

If you are unsure of how any of the mathematical operators in Python work, open the interpreter and try as many things as you have to until they make sense.