Question 1

ThisRandom NumberGeneratoristruly random?？

Accepted Answer

bookToolUseJavaScript'sMath.random()GenerateRandom Number，suitableuseatFairusee.g.、Randometc。e.g.needpasswordSecureRandom Number，suggestUsecrypto API。

Question 2

allowheavyandNo duplicateshaswhatDifference？

Accepted Answer

allowheavytimeperNumbersRandom，mayheavy；No duplicatestimeGenerate'sthehasNumbersdifferent（quantitynotcanSupersetthroughRangewithinIntegernumber）。