How big can a 64bit signed integer be?

Question

In redis,

The range of values supported by HINCRBY is limited to 64 bit signed integers.

And I\'d like to know how big can t

Answer 1

A signed integer ranges from size −2^(n−1) through 2^(n−1) − 1 so in this case the maximum value would be 2 ^ 63 - 1 or 9,223,372,036,854,775,807