Chapter108:CheckedandUnchecked

Section108.1:CheckedandUnchecked

C#statementsexecutesineithercheckedoruncheckedcontext.Inacheckedcontext,arithmeticoverflowraisesan exception. In an unchecked context, arithmetic overflow is ignored and the result is truncated.

shortm=32767;

shortn=32767;

intresult1=              checked((short)(m+n));                //willthrowanOverflowException

intresult2=              unchecked((short)(m+n));//willreturn-2

Ifneitherofthesearespecifiedthenthedefaultcontextwillrelyonotherfactors,suchascompileroptions.

Section108.2: Checkedand Uncheckedas a scope

Thekeywordscanalsocreatescopesinorderto(un)checkmultipleoperations.

shortm =32767;

shortn=32767;

checked

{

intresult1=(short)(m+n);//willthrowanOverflowException

}

unchecked

{

intresult2=(short)(m+n);//willreturn-2

}