Programming Exercise (HP-15C, 15C LE - and others)

[Thomas Klemm]

(03-22-2014 03:02 AM)Gerson W. Barbosa Wrote:  But we can easily break the 20-second barrier on the WP 34S

Yet another idea is to combine two terms: \(\frac{1}{n}-\frac{1}{n+1}=\frac{1}{n(n+1)}\)

Code:

LBL A
0
RCL Y
DEC Z
RCL* Z
1/x
+
DSZ Y
BACK 006
END

10000
XEQ A

Code:

LBL B
INC X
*
1/x
END

9999.00102
\(\sum\) B

We don't have to deal with the alternating sign and it should be both faster and more accurate.

Cheers
Thomas