Doubt in long datatype

[RajendraKr Kumar]

Hello friend,
I have some doubt in long datatype, As i know any long datatype can store max value 9223372036854775807 which i calculated to be 63 bit long only. But by default long datatype can store 64 bit value and max capacity should be 18446744073709551615. I wanted to store 64 bit value(18446744073709551615) in long datatype but it is not being accepted.

long ts=18446744073709551615L;

It is giving error like "Integer number too large".

[Mattias Ahlin]

The long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive).

You're right that is can store 9223372036854775807 different numbers. Since half of them are negative, only half of them can be positive.

[David Nemeskey]

Mattias: the explanation is great, but I guess you wanted to write

"You're right that is can store 18446744073709551616 different numbers. Since half of them are negative, only half of them can be positive."

[RajendraKr Kumar]

Thanks for Reply,
But how can i store this big value(18446744073709551615) in long datatype.

[Jesper de Jong]

You cannot, because that number falls outside the range of the long data type.

[Kaydell Leavitt]

If you need 64 bits or more without the number being negative, you can use the class:

BigInteger

-- Kaydell