What is the purpose of the log function in C++?

The log function in C++ is a part of the math library and is used to calculate the natural logarithm of a number with base e. It converts a number x into a result that satisfies the equation e^result = x. The log function is commonly used in numerical computing, data processing, and scientific calculations.

The definition of the log function is as follows:

double log(double x);

x, a positive real number, represents the base of the exponent. The log function returns the logarithm, which is the value of the logarithm with a base of e.