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Assign Default Value to Variable if Second Variable is Null

/ Published in: C#
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If you set the int keyword to be Nullable, then when x is declared there it's set to null.
On the second line, the "??" are saying if x is null then assign -1 instead.

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  1. Nullable<int> x;
  2.  
  3. int y = x ?? -1;

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