Parsing the provided numbers to two IEEE 754 double-precision floats, and then s...

		Retr0id on Jan 11, 2024 \| parent \| context \| favorite \| on: 9999999999999999.0 – 9999999999999998.0 Parsing the provided numbers to two IEEE 754 double-precision floats, and then subtracting them, yields 2.0 (due to rounding) In particular, 9999999999999999.0 rounds up to 10000000000000000.0 (note, this behavior depends on the rounding mode, https://en.wikipedia.org/wiki/IEEE_754#Rounding_rules )

But here rounding is giving you the wrong answer.