HP -28S Manual page 240

«
~ keys
ml m2 m3 m4
·K
DO CLLCD
ml
I DISP
r'l
2 2 D I :;;;F'
m3 3
DI::;P
m4 4 DISP
DO UNTIL KEY END
UNTIL keys SWAP POS
IF DUP
THH~ I
ELSE' CLLCD "8ad ke'=," I DI:3P
440
,I 8EEP I WAIT
Et·W
Et~D
GET E',}AL CU1F
If you store this program in a variable named KEY?, you could per-
form the example above by executing
-: : "Apple" "8anan."," "Chet-t-'='''
IIAI!
liB
I!
IIC
II
IIPress
ll
" [AJ f,:,t- Apple"
" [8J fot- 8.",nana"
" [CJ for Chert-'=,"
f:::E"""~'
27: Interactive Programs 239
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