Why null is said to be bad
null itself is not bad. It can be said that there are cases where the nullable unsafe type is also convenient for limited use. The bad news is that languages have made nullable unsafe types the default types (eg Java, C #, Objective-C). Such languages unnecessarily run the risk of run-time exceptions as a result of abusing nullable and unsafe types.
[^ 10]: Almost agree with the next article null unsafe languages are no longer legacy languages -Qiita
TBW
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