Program with 10 internal loops takes for ever to returen the result.

[h_nas]

I am writing a program with about 10 internal loops, and its not returning any results, but the counter is still running, I tried to simplify it, still running while I am typing at this moment.

any advise!

[RichardJ]

Do you mean loops nested 10 deep?

Please post the program.

[h_nas]

Yes, they are 10 loops, one inside the other. I tried to simplify them, still take time, any advise in how to shorten the time!!

[RichardJ]

Can you post the worksheet?

[ValeryOchkov]

Richard Jackson wrote:

Can you post the worksheet?

Can I post?

There was an old task USA+USSR=PEACE

We can try to solve this task by using 7 nested for-loops: for U, for S, for A, for R, for E, for C, for E

But we can simplify (by a mind help) this task and have only 3 nested for-loops - for A, for C and for S:

This program gives us 4 solutions (решение) but only first is correct: 932+9338=10270.

Try please solve this (modern) problem USA+IRAN=PEACE

Both tasks are a good example of a combination of own mind and a computer!

[VladimirN]

Please attach your Mathcad worksheet to the message.

[MichaelH]

Try using the trace() or pause() functions at strategic points in the loop and run in debug mode.

Use the help resource for details on how to implement them.

[ValeryOchkov]

MCH wrote:

Try using the trace() or pause() functions at strategic points in the loop and run in debug mode.

Use the help resource for details on how to implement them.

[ptc-4853592]

Hi Valery,

Could you possibly upload the Mathcad 15 version of the Root Newton file you have posted a picture of - and perhaps you could explain to me how you put the squiggly = sign (the approximate sign) - in the program loop - since I thought you could only use Boolean operators in the programming?

Look forward to hearing from you.

Kind regards,

Gordon.

[ValeryOchkov]

I hope the picture help you:

[ptc-4853592]

Hi Valery,

Your foot note below the picture explains why I couldn't see this in Mathcad 15

I haven't moved onto Mathcad Prime yet.

Many thanks,

Gordon.

[Werner_E]

Your foot note below the picture explains why I couldn't see this in Mathcad 15

I haven't moved onto Mathcad Prime yet.

Thats a misunderstanding - its not Prime. On contrary, the whole trick works in Mathcad 15 (and below) only, as Prime is too much limited - there is no choice for infix function evaluation available there AFAIK.

The approximate sign is simply the name of a user defined function which is then used the infix way - you can copy and paste that character from anywhere. One way to do it without any external character map is to go to Help/Quicksheets/ExtraMathSymbols and copy it from there. Everytime you use that newly created function you will have to do some kind of copy and paste action again.

approx.xmcdz.zip

[ValeryOchkov]

It is user defined operator.

In Mathcad Prime Minister it is a built-in operator:

[ptc-4853592]

Hi Werner,

Thanks for showing me something else I didn't know about Mathcad. It would be good if some of you Mathcad experts got together to write a book on the things you just don't see in Mathcad books or on the Mathcad training courses.

Thanks again,

Gordon.

[olivierlp]

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