HP 50g User Manual page 699

program_statements, and passes program flow to the statement following the
END statement.
The CASE, THEN, and END statements are available for selective typing by
using „°@) @ BRCH@ @) C ASE@ .
If you are in the BRCH menu, i.e., („°@) @ BRCH@ ) you can use the following
shortcuts to type in your CASE construct (The location of the cursor is indicated
by the symbol
„@) C ASE@: Starts the case construct providing the prompts: CASE
END END
‚@) C ASE@: Completes a CASE line by adding the particles THEN
Example – program f
The function is defined by the following 5 expressions:
Using the CASE statement in User RPL language we can code this function as:
CASE 'x<3' THEN 'x^2' END 'x<5' THEN '1-x' END 'x<3* '
« «
x
THEN 'SIN(x)' END 'x<15' THEN 'EXP(x)' END –2 END EVAL » »
Store the program into a variable called @@f3c@. Then, try the following exercises:
@@f3c@
1.5
@@f3c@
2.5
@@f3c@
4.2
):
(x) using the CASE statement
3
⎧
⎪
⎪ ⎪
f ( x )
sin(
⎨
3
⎪
exp(
⎪
⎪
⎩
Result: 2.25 (i.e., x
Result: 6.25 (i.e., x
Result: -3.2 (i.e., 1-x)
2
x , if x 3
1 x , if 3 x
x ), if 5 x
x ), if 3 x
, 2 elsewhere
2
)
2
)
5
3
15
THEN
END
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