Natural logarithm of 2.
The natural logarithm of 2 is the number such that pow(E, LN2) == 2
. This value is not exact, but it is the closest representable double to the exact mathematical value.
const double ln2 = 0.6931471805599453
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https://api.dartlang.org/stable/2.0.0/dart-math/ln2-constant.html