Manipulating and comparing floating points in java

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It’s a general rule that floating point number should never be compared like (a==b), but rather like (Math.abs(a-b) < delta) where delta is a small number.

A floating point value having fixed number of digits in decimal form does not necessary have fixed number of digits in binary form.

Addition for clarity:

Though strict == comparison of floating point numbers has very little practical sense, the strict < and > comparison, on the contrary, is a valid use case (example – logic triggering when certain value exceeds threshold: (val > threshold) && panic();)

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