Delphi - Equivalent to C#'s ternary operator?

Of course you can use

IfThen(SomeBooleanExpression, IfTrueReturnValue, IfFalseReturnValue)

where the return values are numeric (uses Math) or string (uses StrUtils). But notice that this will evaluate both arguments in all cases -- there is no lazy evaluation, so it is not as efficient as the ?: operator in C#, where only the right operand is evaluated.

So you cannot do

y := IfThen(x <> 0, 1/x, 0)

The best thing is to stick with an ordinary

if x <> 0 then y := 1/x else y := 0;

The closest you can get to a ternary operator is:

if (condition) then <statement> else <statement>;

As far as I remember, there is no ternary operator in Delphi.

Try the Iff from Jedi:

function Iff(const Condition: Boolean; const TruePart: string; const FalsePart: string): string; overload;
function Iff(const Condition: Boolean; const TruePart: Char; const FalsePart: Char): Char; overload;
function Iff(const Condition: Boolean; const TruePart: Byte; const FalsePart: Byte): Byte; overload;
function Iff(const Condition: Boolean; const TruePart: Integer; const FalsePart: Integer): Integer; overload;
function Iff(const Condition: Boolean; const TruePart: Cardinal; const FalsePart: Cardinal): Cardinal; overload;
function Iff(const Condition: Boolean; const TruePart: Float; const FalsePart: Float): Float; overload;
function Iff(const Condition: Boolean; const TruePart: Boolean; const FalsePart: Boolean): Boolean; overload;
function Iff(const Condition: Boolean; const TruePart: Pointer; const FalsePart: Pointer): Pointer; overload;
function Iff(const Condition: Boolean; const TruePart: Int64; const FalsePart: Int64): Int64; overload;
function Iff(const Condition: Boolean; const TruePart: Variant; const FalsePart: Variant): Variant; overload;