What is "long?"


i saw in code:

long?
question mark mean long?

the ? means can contain null - nullable version of long.

long? mylong;

can set null.

long mylong;

can't.

from

http://msdn.microsoft.com/en-us/library/ctetwysk.aspx

long signed 64 bit integer can take pretty big numbers:

the long keyword denotes integral type stores values according size , range shown in following table.

type

range

size

.net framework type

long                                       

–9,223,372,036,854,775,808 9,223,372,036,854,775,807

signed 64-bit integer

system.int64                    



Visual Studio Languages  ,  .NET Framework  >  Visual C#



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