HP HP-28S - Page 252

For the first example, insert HALT as the first command in FIB2.
Clear
the stack and select the USER menu .
• , CLEAR I 13: I
' USER 1~IiJDIDilII1IIIlmiI __
Use VISIT to return FIB2 to the command line.
['] FIB2 .'vISITI
Insert the HALT command.
[EJ c:ill§] ., CONTRL I HALT
Store the edited version of FIB2.
'ENTER I
I
I : n
IF n 1 :!f
THEN n
« HALT .~ n
«
Calculate Fl' At first, nothing happens except that the 0 annunciator
appears.
'USER I
1 FIB2
Select the PROGRAM CONTROL menu and execute SST (single-step).
WJ.tch the top line of the display to see the first step displayed before
it's executed .
• , CONTRLI
SST
Note that '* n constitutes one step; Pstep" is a logical unit rather than
simply the next object in the program.
28: Programming Examples 251