Simple programming operation, how to do it in Mathcad Prime 3.1?

[jrodriguez-9]

How would you do this "If" and "Otherwise" operation in Mathcad Prime 3.1?  have no idea what command to use or how to start it.

b=  0.85 if f'c=4000 psi               1.05-0.05*f'c/a000 psi  if 4000 psi < f'c  8000 psi                  0.65  otherwise

please see attachment.

[MJG · Accepted solution]

I'm guessing b should be 0.85 if f'c is LESS THAN or equal to 4000 psi -- I doubt b should be 0.65 if f'c is 3500 psi.

This is one approach:

If you have to perform this calculation multiple times, I would suggest making it a function: b(f'c):=...

[jrodriguez-9]

Thank you very much. This answer is how it should be. Of course it does not look as neat as the text book but it does the work.

[MJG]

Mathcad 15 (and prior) is formatted the same as your textbook:

There are many differences between the legacy versions (15 and prior) and Prime.  This is one of them.

[VladimirN]

Juan,

You can start with the study of "PTC Mathcad Prime 3.1 Help Center", here is a "Programs" chapter: PTC Mathcad Prime 3.1 Help Center

[AndyWesterman]

It is possible to write it as chained 'if' statements (check the help centre.

Regards

Andy