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C# return query

Posted on 2006-11-06
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Last Modified: 2010-04-16
I have noticed the use of this code in an application that I am developing can anybody tell me what it means when you have the ? and :

ie return (returnValue == 0 ? true : false);

Does it act like an if else statement??

Many thanks

Cragly
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Question by:Cragly
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2 Comments
 
LVL 13

Accepted Solution

by:
AngryBinary earned 2000 total points
ID: 17881835
This is an abbreviated conditional syntax. The expression preceding the question mark is evaluated. If it is true, the expression preceding the colon is returned. Otherwise, the expression following the colon is returned. In other words,

return (returnValue == 0 ? true : false)

is the same as

if (returnValue == 0) {
    return true;
} else {
    return false;
}

Incidentally, this expression is mildly redundant, especially considering that this abbreviated syntax slightly reduces the codes readability. Even though I would consider the 'if/else' to be the preferred syntax, since it is easier to read, an equivalent shorthand expression would be:

return (returnValue == 0);

which would return true or false, depending on the value of returnValue.

Cheers,
Randall
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Author Comment

by:Cragly
ID: 17881994
Cheers many thanks for your help
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