Returns the round off unit for double precision arithmetic.

Contents

Interface Function Documentation Page Comments

Interface

#include <codecogs/computing/lowlevel/machine_epsilon.h>

using namespace Computing::Lowlevel;

double

machine_epsilon ()[inline] Returns the round off unit for double precision arithmetic.

Function Documentation

The machine epsilon, is defined as the smallest positive number such that is not equal to 1.0.

Example 1:

#include <codecogs/computing/lowlevel/machine_epsilon.h>
#include <iostream>
#include <iomanip>
int main()
{
  std::cout << "epsilon = ";
  std::cout << std::setprecision(15) << Computing::Lowlevel::machine_epsilon();
  std::cout << std::endl;
  return 0;
}

Output:

epsilon = 2.22044604925031e-016

References:

SUBSET, a C++ library of combinatorial routines, http://www.csit.fsu.edu/~burkardt/cpp_src/subset/subset.html

Returns:

the round off unit for double precision arithmetic