line breaks with HP50g

[tigger]

Cool, real great, thanks,...

I keyed the program. My results are:
If I key F1 Prog: error, I have always to key RS F1(Prog) -> I can see the program.
If I key F1 Prog.S: I can see the program imediately.

I understand, what the program is for, but I do not know where to put line breaks and strings because I do not understand the way the HP50g works.
<< 2 - 1 5 √ + 2 / → N H
<< H N 2 + ^ 1 H - N 2 + ^ - 5 √ / EVAL >> >>

I debugged the program (in exact mode) and I started with A in the stack. To a certain point I had fraction. In the midst of the program the HP switched to appr. mode. (Why?) I got a long answer (with real numbers), which I could neither read on the display nor understand. I got three lines with VIEW -> TEXT.

Could we go through the program.

questions:
1. I do not know. what EDITB does.
2. Is it possible to see long results on the display. Sometimes there is not enough space for the long result on the display and I can only see parts of the result there.
3. Could help me to show the line breaks, or the begin and the end of a command. How do I know where a command starts and ends.
4. Why does the HP switch from exact to appr mode while executing the program. (Probably it was not this program. Before I had problems with other programs.)


5. Every three month I have to change batteries. Is this usual?

PS: Could you recomand a page, which teaches programming in C?
Are you experienced with wolfram alpha (wolframalpha.com)?