Python3 Allows you to put underscores in numbers for legibility:
a = 100_000 b = 1_000_000
a = 100_000 b = 1_000_000
Traditional FORTRAN ignores all spaces, so one can write a million as 1 000 000 there, C++14 allows apostrophes (https://en.wikipedia.org/wiki/Decimal_separator#Data_versus_...)