Python - Rounding, Banker's Rounding (round, math.ceil, math.floor, math.trunc) Tutorial

In depth tutorial of rounding with Python, geared to beginners. Discussion of the built-in round function, as well as getting ceilings, floors, and truncating numbers using Python's math module. Includes discussion of why numbers ending in .5 sometimes rounds up and sometimes rounds down (i.e. Banker's Rounding, aka Dutch Rounding or Gaussian rounding), and a couple of different ways to get numbers ending in .5 to always round up instead. Time stamps are below.

round() - 0:22
Why do numbers ending in .5 sometimes round down and sometimes round up? (Banker's Rounding (rounding to the nearest even result)) - 1:34
round() to specified number of digits - 6:25
round() to "None" number of digits - 7:37
round() using expressions inside the parenthesis - 9:32
Can you round infinity or "not a number"? - 13:05
Taking ceiling of negative number - 15:59
Can you truncate "infinity" or "not a number"? - 23:57

[mihaelasava]

I came here for understanding round() function. Excellent explanation, now everything is clear. Thank you!

[onkarkulkarni]

Very Very Helpful Bro...Thank You Too Most...🥳💫🥳💫🥳💫

[legion_prex]

to be fair, it is not a choice of python, it is the standard in IEEE 754 for rounding numbers.

[legion_prex]

round(5.65, 1) should round to 5.6, right? But it does round up to 5.7. Who knows why?

[albaraa_]

How can I round to the nearest integer?