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HP 20b Instruction Manual
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HP 20b Instruction Manual

HP 20b Instruction Manual

Using the rpn stack to solve problems efficiently
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Download this manual See also: User Manual, Installation Manual
Enlarged version
hp calculators
HP 20b Using the RPN stack to solve
problems efficiently
The benefits of understanding RPN stack operations
Understanding the HP 20b RPN stack operation
in RPN mode
Viewing and reordering stack-register contents
Using ANS contents in chain calculations
Practice solving problems using stack registers

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Summary of Contents for HP HP 20b

  • Page 1 HP 20b Using the RPN stack to solve problems efficiently The benefits of understanding RPN stack operations Understanding the HP 20b RPN stack operation in RPN mode Viewing and reordering stack-register contents Using ANS contents in chain calculations...

  • Page 2: T Z Y X

    To put the HP 20b into RPN mode, press :u, then press < five times. The display should show either Chain, Algebraic or RPN. If it does not show RPN and you wish to put the HP 20b into RPN mode, press I until the display shows RPN (which would only take one or two times).

  • Page 3: Figure 3

    5. maintain a copy of T-register contents in T. NOTE: On the HP 20b, the I key terminates digit entry and places the keyed value into the X register. It does not copy this value into the Y-register the way previous RPN calculator implementations have done. In this sense, the HP 20b operates more like the graphical RPL calculators.

  • Page 4: Table Of Contents

    The sequence :k2* computes the second part of the right side of the equation, once the original value of X has been brought back from the ANS-register. hp calculators - 4 - HP 20b Using the RPN stack to solve problems efficiently - Version 1.0...

  • Page 5: 567:N:d:k2

    One of the shortest keystroke sequences to compute y in the expression is: 3.4567:n:d:i}:d:k2*++ Figure 9 These examples only begin to scratch the surface of the possibilities that exist when using RPN. hp calculators - 5 - HP 20b Using the RPN stack to solve problems efficiently - Version 1.0...