a _decimal value
true if x is zero, false otherwise (any other value than zero)
assert(isZero(decimal32(0))); assert(!isZero(decimal64.nan)); assert(isZero(decimal32("0x9FFFFFp+10")));
If the internal representation of the _decimal data type has a coefficient greater that 10precision - 1, is considered 0 according to IEEE standard.
Determines if x represents the value zero. This operation is silent, no error flags are set and no exceptions are thrown.