Literals/Floating point: Difference between revisions

=={{header|NetRexx}}==

NetRexx supports ''decimal'' and ''exponential'' notation for floating point constants.

A number in ''exponential notation'' is a simple number followed immediately by the

sequence &quot;<tt>E</tt>&quot; (or &quot;<tt>e</tt>&quot;), followed immediately

by a sign (&quot;<tt>+</tt>&quot; or &quot;<tt>-</tt>&quot;), followed immediately

by one or more digits.

NetRexx supports floating point number notation in the primitive ''float'' and ''double'' types,

it's built in ''Rexx'' object and any other Java object that supports floating point numbers.

<lang NetRexx>/* NetRexx */

options replace format comments java crossref symbols nobinary

numeric digits 40 -- make lots of space for big numbers

numeric form scientific -- set output form for exponential notation

say 'Sample using objects of type "Rexx" (default):'

fv = 1.5; say '1.5'.right(20) '==' normalize(fv).right(20) -- 1.5

fv = -1.5; say '-1.5'.right(20) '==' normalize(fv).right(20) -- -1.5

fv = 15e-1; say '15e-1'.right(20) '==' normalize(fv).right(20) -- 1.5

fv = 3e-12; say '3e-12'.right(20) '==' normalize(fv).right(20) -- 3E-12

fv = 3e+12; say '3e+12'.right(20) '==' normalize(fv).right(20) -- 3000000000000

fv = 17.3E-12; say '17.3E-12'.right(20) '==' normalize(fv).right(20) -- 1.73E-11

fv = 17.3E+12; say '17.3E+12'.right(20) '==' normalize(fv).right(20) -- 17300000000000

fv = 17.3E+40; say '17.3E+40'.right(20) '==' normalize(fv).right(20) -- 1.73E+41

fv = 0.033e+9; say '0.033e+9'.right(20) '==' normalize(fv).right(20) -- 33000000

fv = 0.033e-9; say '0.033e-9'.right(20) '==' normalize(fv).right(20) -- 3.3E-11

say

say 'Sample using primitive type "float":'

ff = float

ff = float 15e-1; say '15e-1'.right(20) '==' normalize(ff).right(20) -- 1.5

ff = float 17.3E-12; say '17.3E-12'.right(20) '==' normalize(ff).right(20) -- 1.73E-11

ff = float 17.3E+12; say '17.3E+12'.right(20) '==' normalize(ff).right(20) -- 17300000000000

ff = float 0.033E+9; say '0.033E+9'.right(20) '==' normalize(ff).right(20) -- 33000000

ff = float 0.033E-9; say '0.033E-9'.right(20) '==' normalize(ff).right(20) -- 3.3E-11

say

say 'Sample using primitive type "double":'

fd = double

fd = 15e-1; say '15e-1'.right(20) '==' normalize(fd).right(20) -- 1.5

fd = 17.3E-12; say '17.3E-12'.right(20) '==' normalize(fd).right(20) -- 1.73E-11

fd = 17.3E+12; say '17.3E+12'.right(20) '==' normalize(fd).right(20) -- 17300000000000

fd = 17.3E+40; say '17.3E+40'.right(20) '==' normalize(fd).right(20) -- 1.73E+41

fd = 0.033E+9; say '0.033E+9'.right(20) '==' normalize(fd).right(20) -- 33000000

fd = 0.033E-9; say '0.033E-9'.right(20) '==' normalize(fd).right(20) -- 3.3E-11

say

return

/**

* Convert input to a Rexx object and add zero to the value which forces NetRexx to change its internal representation

*

* @param fv a Rexx object containing the floating point value

* @return a Rexx object which allows NetRexx string manipulation methods to act on it

*/

method normalize(fv) private constant

return fv + 0

</lang>

'''Output:'''

<pre>

Sample using objects of type "Rexx" (default):

1.5 == 1.5

-1.5 == -1.5

15e-1 == 1.5

3e-12 == 3E-12

3e+12 == 3000000000000

17.3E-12 == 1.73E-11

17.3E+12 == 17300000000000

17.3E+40 == 1.73E+41

0.033e+9 == 33000000

0.033e-9 == 3.3E-11

Sample using primitive type "float":

15e-1 == 1.5

17.3E-12 == 1.73E-11

17.3E+12 == 17300000000000

0.033E+9 == 33000000

0.033E-9 == 3.3E-11

Sample using primitive type "double":

15e-1 == 1.5

17.3E-12 == 1.73E-11

17.3E+12 == 17300000000000

17.3E+40 == 1.73E+41

0.033E+9 == 33000000

0.033E-9 == 3.3E-11

</pre>