Obtaining the additive inverse of a two’s complement integer using bitwise negation and addition:
In [1]: x = 2
In [2]: ~x + 1
Out[2]: -2
In [3]: x = -77
In [4]: ~x + 1
Out[4]: 77
Thu Apr 19 02:16:42 2018
Obtaining the additive inverse of a two’s complement integer using bitwise negation and addition:
In [1]: x = 2
In [2]: ~x + 1
Out[2]: -2
In [3]: x = -77
In [4]: ~x + 1
Out[4]: 77