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Order of operations - what is 6÷2(1+2) ? - Printable Version

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RE: Order of operations - what is 6÷2(1+2) ? - Gerson W. Barbosa - 01-04-2021 04:28 AM

(01-04-2021 04:16 AM)WrongWay Wrote:  -2^2 on the 41CV evaluates to 4

You’re probably doing

2 CHS x^2

That’s (-2)^2

If you want -2^2 then the right keystrokes sequence should be

2 x^2 CHS


RE: Order of operations - what is 6÷2(1+2) ? - WrongWay - 01-04-2021 05:52 AM

Or the respondent is being a bit of a smart ass Smile. Agreed though, there is no room for ambiguity. you need to be clear if you want -(2)^2 or (-2)^2. Happy new year to all.


RE: Order of operations - what is 6÷2(1+2) ? - mfleming - 01-04-2021 03:39 PM

(01-04-2021 04:26 AM)rprosperi Wrote:  If the equation is ambiguous and precedence rules are not provided, a 'correct' answer is not possible, and it probably means someone is trying to lure you in to a conversation like this one. Smile

Code:


TryAPL Version 3.4.1 (Dyalog version 18.0)
Mon Jan 04 2021 07:31:33
Copyright (c) Dyalog Limited 1982-2021
      -2*2
¯4
       ¯2*2
4
What other languages disambiguate such expressions by providing a separate symbol for a negative value?