IBM 5100 - Page 148

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INTERACTIVE FUNCTIONS
User-defined functions can display messages and/or request input from the key-
board. The messages (character
data) in the user-defined function are enclosed in
quotes. The 0 (quad) and [!] (quad quote) symbols are used to request input from
the keyboard during function execution. The following function is an example of
an interactive function that computes the amount of interest on a capital amount
for a given number of years:
V C1
[1J 'ENTER THE CAPITAL AMOUNT IN DOLLARS'
[2] A~"[]
[3] 'ENTER THE INTEREST IN PERCENT'
[1+:1 I~-IJ
[S] 'ENTER THE PERIOD IN YEARS'
£: 6::1 Y~"J]
[7J 'THE RESULT IS'
[8] AX(1+0,01xI>*YV
CI
ENTER THE CAPITAL AMOUNT IN DOLLARS
[]:
:1.00
ENTER THE INTEREST IN PERCENT
1]:
B
ENTER THE PERIOD IN YEARS
[]:
THE I~ESUI...T IS
:f.:l.6,6'+
CI
ENTER THE CAPITAL AMOUNT IN DOLLARS
[]:
:1.000
ENTER THE INTEREST IN PERCENT
[]:
8,8B
ENTER THE PERIOD IN YEARS
[] :
~ ..
~j
THE RESULT IS
1. ::j:~(} ,2