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+--- Thread: [HP50g] why this ? (/thread-9486.html)
[HP50g] why this ? - Gilles59 - 11-12-2017 09:19 PM
I know it's not a good idea to change the value of the counter of a "FOR NEXT" loop. But consider :
Code:
« 0.
0. 100. FOR p
1. 'p' STO+
1. +
NEXT
»You get 50. seems logic...
Now try :
Code:
« 0.
1. 100. FOR p
p NEXTPRIME 'p' STO
1. +
NEXT
»You get .... 1. The loop excecutes only once.
Is this a bug or I misunderstand something ?
EDIT : Ohoh ! The bug is only in approx mode ( |R ) .... NEXTPRIME always returns an integer ( 1. NEXTPRIME returns 2 and the loop dont works). With and I->R after NEXTPRIME, it's OK
RE: [HP50g] why this ? - Gerson W. Barbosa - 11-12-2017 11:16 PM
Shorter, but slower:
100
« -1, 1, ROT
DO ROT 1, + ROT NEXTPRIME ROT DUP2
UNTIL ≥
END DROP2
»
EVAL
—> 25.