① The / operator performs floating point division. It returns a float even if both the numerator and denominator are ints.
② The // operator performs a quirky kind of integer division. When the result is positive, you can think of it as truncating (not rounding) to 0 decimal places, but be careful with that.
③ When integer-dividing negative numbers, the // operator rounds “up” to the nearest integer. Mathematically speaking, it’s rounding “down” since −6 is less than −5, but it could trip you up if you were expecting it to truncate to −5.
④ The // operator doesn’t always return an integer. If either the numerator or denominator is a float, it will still round to the nearest integer, but the actual return value will be a float.
⑤ The ** operator means “raised to the power of.” 112 is 121.
⑥ The % operator gives the remainder after performing integer division. 11 divided by 2 is 5 with a remainder of 1, so the result here is 1.