Machine Epsilon

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Returns the round off unit for double precision arithmetic.

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Contents

Interface
Machine Epsilon
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Interface

C++

Machine Epsilon

doublemachine_epsilon(

)[inline]

The machine epsilon, $\inline \epsilon$ is defined as the smallest positive number such that $\inline 1.0 + \epsilon$ 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

Source Code

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