LAST on HP20S

[rprosperi]

(07-08-2016 09:33 AM)jbhp55 Wrote:  One extra remark about LAST: it does not always give the result of the last completed calculation after you start a new one, as described by you.

1
+
1
= -> 2
2
+
2
= -> 4
LAST -> 2
3
+
LAST (2, not 4)
= -> 5

This is because using LAST changes the new value of LAST as you noted earlier.

In your example above, if you had not accessed LAST after getting the result of 4, you would have the expected result:

1
+
1
= -> 2
2
+
2
= -> 4
3
+
LAST (4)
= -> 7

So if you only use LAST to access the "LAST" result, it will behave as expected, but you must keep in mind the using LAST changes the "new" value of LAST.

I agree, go with the 32SII, for me a far better and easier to understand machine. The algebraic Pioneers intrigued me so I played with them a lot to try to understand this system. Then went back to RPN, where I had think a lot less. Programming with the algebraic system was very tedious, though Gene says it's because I didn't use my TI machines enough....