How is the log function used in C++?

1 year ago
Emily Johnson
1 minute

The log function in C++ is used to calculate the natural logarithm. Its prototype is as follows:

double log(double x);

One of the parameters, x, is the value for which the natural logarithm needs to be calculated.

Example usage:

#include <iostream>
#include <cmath>

int main() {
    double x = 10.0;
    double result = log(x);
    
    std::cout << "log(" << x << ") = " << result << std::endl;
    
    return 0;
}

Output result:

log(10) = 2.30259

In this example, the log function is used to calculate the natural logarithm with base e.

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