Short-circuit logic should be used in boolean contexts, is there any difference using "&", "&&"

Question

I reviewed code and I found this operator & is there any difference with && if I want to change to &&

public bool isTemplate(string template)
{
    return (isValid() & lc.templates.Any(x => x.Id.Equals(template, StringComparison.Current)));
}

For that particular code, it looks like you should indeed change to use `&&` — Matthew Watson, May 12 '21 at 08:54
Operator `&&` compare boolean values (it is a test of equality to true (0) or false(1)), if first is false, next is not evaluated and result is false, and so on. Operator `&` "compare" bits (it is a binary calculation in fact), all are evaluated. — , May 12 '21 at 09:04
See [Boolean algebra](https://en.wikipedia.org/wiki/Boolean_algebra) and [Conditional (computer programming)](https://en.wikipedia.org/wiki/Conditional_(computer_programming)) — , May 12 '21 at 09:10

score 4 · Accepted Answer · answered May 12 '21 at 08:50

4

& operator always evaluates both operands.

&& operator evaluates the right-hand operand only if it's necessary.

answered May 12 '21 at 08:50

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