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log()Prototype: double log(double anumber);Header File: math.h (C) or cmath (C++) Explanation: Log returns the natural logarithm for anumber, as long as it is not negative, or zero. .
//Example gives the natural logarithm of 100
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
cout<<log(100);
}
Other Functions
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