log2()
Prototype: double log2(double anumber);
Header File: math.h (C) or cmath (C++)
Explanation: Log2 returns the base 2 logarithm for anumber, as long as it is
not negative, or zero.
//Example gives the log base 2 of 32
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
cout<<log2(32);
}
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