I couldn't think of a better name. Please feel free to edit. On Python, I tried rounding the number 6.2 to 15 decimal places after seeing this thread and got:
round(6.2,15)
=> 6.2000000000000002
Great! Now I try the same thing for 1.2 and:
round(1.2,15)
=> 1.2
Huh? That's my only reaction.