6/25/2023 0 Comments Kotlin do if not nullTruth is, the ‘null’ (or None) problem is still there for python programs. Whoopsy! Null safety is the language ensuring you never make the mistake of forgetting to check for ‘null’ when you need to check. But what if there is a case when the program accidentally does not set ‘foo’? If you try and add the python equivalent of ‘null’ (None) to an int value, the error “TypeError: unsupported operand type(s) for +: ‘int’ and ‘NoneType'” will be raised. A variable ‘foo’ which is to be an ‘int’ could be set to ‘null’ until an actual value is calculated and set. Null is normally a placeholder for a value, only used where the value is not yet known. Null safety is all about preventing code from accidentally using a value which is null. So what is ‘null’ safety? Firstly, if you any questions on what ‘null’ is, then check the page None, Unit, Nothing, void and null. To python programmers, ‘Null Safety’ can sound like solving a problem they never had. To java programmers, ‘Null Safety’ can sound like the ‘Holy Grail’.
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