[parameter]=100 ， Values that equal 100, to 3 significant figures precision, so this is actually searching for values in the range [99.5 … 100.5)

and

[parameter]=100.00， Values that equal 100, to 5 significant figures precision, so this is actually searching for values in the range [99.995 … 100.005)

in the case , the 2.0 should:

[parameter]=2.0, Values that equal 2, to 2 significant figures precision, so this is actually searching for values in the range [1.5 … 2.5)

but the spec also said: The number 2.0 has a range of 1.95 to 2.05

I’m so confused.

what the “significant figures precision” used for? and how to seach Values that equal exactly 2.0 if the target value is decimals?