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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