NAG Library Manual, Mark 27
Interfaces:  FL   CL   CPP   AD 
NAG FL Interface Introduction
X01 (Math) Chapter Contents
X01 (Math) Chapter Introduction
x01ab:  FL   CL   CPP   AD 

NAG FL Interface
x01abf (euler)

NAG Library Manual, Mark 27
Interfaces:  FL   CL   CPP   AD 
NAG FL Interface Introduction
X01 (Math) Chapter Contents
X01 (Math) Chapter Introduction
x01ab:  FL   CL   CPP   AD 

▸▿ Contents

© The Numerical Algorithms Group Ltd. 2019

1 Purpose

x01abf returns the numerical value of γ (Euler's constant).

2 Specification

Fortran Interface
Function x01abf ( x)
Real (Kind=nag_wp) :: x01abf
Real (Kind=nag_wp), Intent (In) :: x
C Header Interface
#include <nag.h>
double  x01abf_ (double *x)
The routine may be called by the names x01abf or nagf_math_euler.

3 Description

None.

4 References

None.

5 Arguments

1: x – Real (Kind=nag_wp) Dummy

6 Error Indicators and Warnings

None.

7 Accuracy

The result should be correct to machine precision (see Chapter X02).

8 Parallelism and Performance

x01abf is not threaded in any implementation.

9 Further Comments

None.

10 Example

None.
NAG Library Manual, Mark 27
Interfaces:  FL   CL   CPP   AD 
NAG FL Interface Introduction
X01 (Math) Chapter Contents
X01 (Math) Chapter Introduction
x01ab:  FL   CL   CPP   AD 
© The Numerical Algorithms Group Ltd. 2019