Conditional / Ternary Operator

Conditional Operator / Ternary Operator :
    

  • condition ? true_expression : false_expression;
    • 

  • bool x = condition ? true : false;
    • 


eg : 
string result = (percentage >= 36) ? "pass" : "fail" ;


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NullCoalesce (??)


    

  • int totalMarks = marks ?? 0 ;
    • 


The ?? operator is called the null-coalescing operator. It returns the left-hand operand if the operand is not null; otherwise it returns the right hand operand.eg: 




int? x = null; 
int y = x ?? -1;




int? is a shorthand for Nullable, which itself is shorthand of Nullable. 
eg Nullable a = null;
A nullable type can represent the correct range of values for its underlying 
value type, plus a additional null value.






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