C++
- Getting started with C++
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- Bit Manipulation Application: Small to Capital Letter
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-
Date and time using
header - decltype
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C++ Bit Manipulation Check if an integer is a power of 2
Example
The n & (n - 1) trick (see Remove rightmost set bit) is also useful to determine if an integer is a power of 2:
bool power_of_2 = n && !(n & (n - 1));
Note that without the first part of the check (n &&), 0 is incorrectly considered a power of 2.
