C Library Functions  - dnum0 (3)

NAME
dnum0(3f) - [M_calculator] return double precision value from string expression using calculator(3f) (LICENSE:PD)

CONTENTS

Synopsis
Description
Examples
See Also
Author
License

SYNOPSIS
doubleprecision function dnum0(inline,ierr) 

   character(len=*),intent(in)  :: inline
   integer,optional,intent(out) :: ierr

DESCRIPTION
DNUM0() is used to return a DOUBLEPRECISION value from a CHARACTER string representing a numeric expression.
o If an error occurs in evaluating the expression INUM() returns zero(0).
o DNUM0() ultimately uses the calculator routine CALCULATOR(3f)
inline INLINE is a CHARACTER variable up to (iclen_calc=255) characters long that is similar to a FORTRAN 77 numeric expression.
ierr error code. If zero, no error occurred

EXAMPLES
Sample Program 

    program demo_dnum0
    use M_calculator, only : dnum0
    implicit none
       doubleprecision x,y,z
       X=DNUM0(’20/3.4’)
       Y=DNUM0(’CI = 10 * sin(3.1416/4)’)
       Z=DNUM0(’CI’)
       write(*,*)x,y,z
    end program demo_dnum0

SEE ALSO

o The syntax of an expression is as described in the main documentation of the Calculator Library.
o See EXPRESSION(), CALCULATOR(), STRGAR2(), RNUM0(), SNUM0().

AUTHOR
John S. Urban

LICENSE
Public Domain

Nemo Release 3.1 dnum0 (3) June 29, 2025
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