HP HP-15C - Example: Branching and Looping

SectionS: Calculating in Complex Mode 91
Keystrokes Display
Restores ZQ.
Calculates Im(P(z0))
(or Re(P(z0)) for
equipotential line.)
Stores c in R5.
Loop for finding yk.
Increments counter k in
Index register.
Recalls h.
Recalls counter k.
Calculates kh.
Recalls XQ.
Calculates x^ = x0 + kh.
Stores Xfr in R6.
Recalls y/{ _ ± from R3.
Duplicates y^ _ j for
second estimate.
Searches for y^.
Branches for valid y^ root.
Starts decreasing step
size.
Decrements counter k.
Reduces h by factor of 4.
Multiplies counter by 4.
Loops back to find y^
again.
Continues finding y^.
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020- 43 32
021-42,21, 1
022- 42 30
023- 3212
024- 44 5
025-42,21, 2
026- 1
027-44,40,25
028- 45 4
029- 45 25
030- 20
031- 45 2
032- 40
033- 44 6
034- 45 3
035- 36
036-42,10, 3
037- 22 4
038- 1
039-44,30,25
040- 4
041-44,10, 4
042-44,20,25
043- 22 2
044-42,21, 4
045- 45 6
046- 42 31
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Displays xk.
•-xk.