Exponential and logarithmic math functions

In this Java code example common exponential and logarithmic math functions are applied to the datatype double.

public class ExpLogFunctions {
	public static void main(String[] args) {
		double exp, exp1, log, log10, log1p;
		
		// Returns Euler's number e raised to the power of a double value
		exp = Math.exp(1);
		// Returns ex -1. 
		// Note that for values of x near 0, the exact sum of expm1(x) + 1 
		// is much closer to the true result of ex than exp(x)
		exp1 = Math.expm1(1);
		// Returns the natural logarithm (base e) of a double value
		log = Math.log(10);
		// Returns the base 10 logarithm of a double value
		log10 = Math.log10(100);
		// Returns the natural logarithm of the sum of the argument and 1. 
		// Note that for small values x, the result of log1p(x) is much closer to 
		// the true result of ln(1 + x) than the floating-point evaluation of log(1.0+x)
		log1p = Math.log1p(10);

		System.out.println("Exp: " +  exp);
		System.out.println("Exp1: " +  exp1);
		System.out.println("Log: " +  log);
		System.out.println("Log10: " +  log10);
		System.out.println("Log1p: " +  log1p);
	}
}

Output

Exp: 2.718281828459045
Exp1: 1.718281828459045
Log: 2.302585092994046
Log10: 2.0
Log1p: 2.3978952727983707