Determines if x represents a NaN. This operation is silent, no error flags are set and no exceptions are thrown.
a _decimal value
true if x is NaN (quiet or signaling), false otherwise (any other value than NaN)
assert(isNaN(decimal32())); assert(isNaN(decimal64.nan)); assert(!isNaN(decimal128.max));
See Implementation
Determines if x represents a NaN. This operation is silent, no error flags are set and no exceptions are thrown.