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TextFile

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Predeclared constants for ALGOL 8 programs         1980-09-24


Physics constants (J. Phys. Chem. Ref. Data 2 663 (1973))

ryinf      , Rydberg constant                   10973731.77 m-1
hplanck    , Planck  constant                  6.626176'-34 J s
hbar       , Planck  constant/2/pi            1.0545887'-34 J s
a0         , Bohr radius                      5.2917706'-11 m
ec         , Elementary charge                1.6021892'-19 C
cms        , Speed of light                       299792458 m/s
ev         , Electron Volt                    1.6021892'-19 J
alfa       , Fine structure constant           7.2973506'-3
cau        , 1/alfa                               137.03604
amu        , u (atomic mass unit)             1.6605655'-27 kg
na         , N (Avogadro constant)             6.0220450'23 mole-1
uc2        , u*c**2                                931.5016 MeV
me         , Electron mass                     5.4858026'-4 u
mp         , Proton mass                        1.007276470 u
auev       , a.u./eV                              13.605804 eV
faraday    , Faraday  constant                   9.648456'4 C/mol
myb        , Bohr magneton                     9.274078'-24 J/T
mye        , Electron magnetic moment          9.284832'-24 J/T
myn        , Nuclear magneton                  5.050824'-27 J/T
gasconstant, Molar gas constant                     8.31441 J/mol/K
boltzmann  , Boltzmann constant                1.380662'-23 J/K
gravitation,gravitational constant              6.6720'-11 m3/s2/kg


Mathematical constants

e          , base of natural logarithm        2.71828182864
pi         , pi                               3.14159265360
euler      , Euler constant                   0.57721566490
sqrt2      , square root of 2                 1.41421356240
ln10       , natural logaritm of 10           2.30258509304


Machine constants

max integer, greatest positive integer              8388607
max long   , greatest positive long         140737488355327
max real   , greatest positive real       1.61585030344'616
small real , machine accuracy            0.291038304560'-10

This description is found in the file "constant"
With algol 8 all booleans has benn removed
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