A general purpose calculator Rexxlet

By

This "rexxlet" may be used in your HTML pages to evaluate any REXX valid expression.

Assuming you want to display the hexa value of a decimal number, in a statement as :

The value of 1515 (decimal) is 05EB (hexadecimal)

Just include the following line in your page :

... The value of 1515 (decimal) is <img src="http://www.hhns.fr/rexxlet/rxcalc.cgi?small+aqua+d2x(1515)" align=center> (hexadecimal)

• the first parameter is the font's size : Tiny, Small, Medium, Large, Giant (1st letter good enough).
• the second parameter is the 'BGCOLOR' parameter (some kind of blue here).
• the third parameter is any valid REXX expression you want to be evaluated.
  (the "+" sign must be entered as '%2B')

The result will look like:

... The value of 1515 (decimal) is (hexadecimal)

You may use any builtin REXX function, plus the following functions:

• sin(r)
• cos(r)
• atan(r)
• atan2(r1,r2)
• fact(n)
• pow(r1,r2)
• exp(r)
• log(r)

Other examples :

Euro to FF converter, BGColor Yellow :

115 Euros make about
<img src="http://www.hhns.fr/rexxlet/rxcalc.cgi?small+yellow+format(115/0.1515,6,2)"
align=center> FF.

The result will look like:

115 Euros make about FF.

A 'Scientific' computation : atan(1), result in degrees, BGColor Red :

atan(1) =
<img src="http://www.hhns.fr/rexxlet/rxcalc.cgi?small+red+format(atan(1)*180/3.14159)"
align=center> degrees.

The result will look like:

atan(1) = degrees.

Test it with your own values :

Enter manually http://www.hhns.fr/rexxlet/rxcalc.cgi?medium+red+2*2 in your navigation bar, then modify the expression (remember : '%2B' for the '+' sign, and '%2F' for the '/' [divide] sign).
or, better,

click here, (you'll get a new window) then modify the expression '2*2' in the navigation bar.

You may specify the color either by its hex value (i.e. 00FFFF), or by its official name (Red, blue, Yellow ...)
By default : 'fuschia'.

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Have a look to the rxcalc program source

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