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Reader's digest: The HP Prime heritage on case sensitivity
08-31-2014, 01:55 PM
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Reader's digest: The HP Prime heritage on case sensitivity
While checking my HP-28S documentation, most from the MoHPC DVD, I also have accessed an interesting document in the net titled as An Aeronautical Engineerings user's manual to the HP-28S handheld calculator. (1991)

And in this document the author mention this interesting observation on the HP-28S case behavior (page 10) , which reminds me of the similar HP-Prime behavior despite on a different context:

CASE SENSITIVITY
The programs listed herein must be typed into the HP-28S
exactly as shown. It is crucial to observe upper and lower
case carefully. In the calculator, 'I' and 'x' might have
been defined to represent two different values; in fact, one
could be a complex number or a string, and the other could be
a matrix!
Note for example that the statement "sin=5', using all
lowercase letters, is perfectly legal, and assigns the value
5 to the variable named 'sin'. The sine trig function is
called SIN, with all uppercase letters, and neither this
function nor the 'sin' variable is equivalent to another
variable named 'Sin'!
To further confuse things, all upper and lower case
characters are displayed only in upper case on the softkey
display. Thus, two variables 'X' and 'x' could both appear
simultaneously as 'X' on the display.

Jose Mesquita
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Reader's digest: The HP Prime heritage on case sensitivity - jebem - 08-31-2014 01:55 PM



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