HP 39gs Master Guide

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CEILING(<num>)
This is a ‘rounding’ function but different in that it always rounds up to the integer above. Mainly of interest to
programmers.
Eg.
CEILING(3.2) = 4
CEILING(32.99) = 33
CEILING((12+ 6)/7) = CEILING(2.0642…) = 3
Note:
CEILING(-2.56) = -2 not -3. The CEILING function rounds up
to the next integer above, which is -2.
See also:
ROUND, TRUNCATE, FLOOR, INT
DEG
RAD(<deg>)
This function converts degrees to radians.
Eg.
DEG RAD(30) = 0.5235…
DEG RAD(180) = 3.1415926…
RAD HMSDEG, HMS ,
See also:
FLOOR(<num>)
This function is the same as the
CEILING function, except that it always
rounds down.
Eg.
FLOOR(3.75) = 3
FLOOR(45.01) = 45
Note:
FLOOR(-2.56) = -3 not -2.
The
FLOOR function is the same as the mathematical function ‘greatest
integer’ which is studied in many mathematical courses.
If you want to graph the greatest integer function then you will need to
use the
PLOT SETUP view to turn off CONNECT first, since the graph
is supposed to be a discontinuous step function. The result with
CONNECT turned on is not good.
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HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm