You can just type the "if" condition together with the brackets from the keyboard. To hide the condition, use the pre-inserted Area block, and then close it (in Prime 4.0 you can set a password on this Area block).
You type the expression normally as seen.
Valery used the if-function (which is available in Prime Express, too). There also is the programming "if"-statement which looks differently and programming is offered only in the paid for version.
In Mathcad 15 and below there were some nice ways to hide the calculations and just show colored text boxes with the result using scripted components. Prime in version 4 still does not offer that.
So all you could do is to hide the calculation in a collapsed region.
I can't open your worksheet (just have Prime 3.0 here) so find attached an example of what I was talking about.
This is what is may look collapsed:
and here opened up:
OK, you could copy the if statetment from my sheet to yours and change the variables.
Note, that you can also use the if-function which Valery showed first (status1 in my sheet).
Here the if is NOT taken from the programming menu but just normally typed, the same way as you would type sin(...) or ln(...).
You simply type in the boolean expression, a comma, the "yes" answer, a comma and then the "no" answer.
I guess the problem was, that you erranously took the programming if (my status2).
Of you like the programming if more, here is how to do it:
1) Type status := and then, from the programming menu chose "program"
2) Again from the programming menu chose "if" (most shown keyboard shortcuts don't work on my German keyboard)
3) Fill in the condition in the first placeholder
4) in the second placeholder type the return value for "true"
5) Now comes the tricky part, as editing and seeing where the insert cursor is is really hard in that silly Prime
press the right arrow key twice to go to the end of the if-statement and then press Return. This should get you a placeholder in the exact position as shown below
6) Now chose "else" from the programming menu, insert "FAIL" in the placeholder and click outside that math region.
You are done and can use the variable status as you like.
BTW: Instead of using the menu for if and else you also may simply manually type the word "else" (without the quotes) and immediately press Strg+J simultaneously. This will turn your text into a program statement. A very convenient method.
If you have the answer as [123] not 123 you must find how you get matrix (vector) not scalar
or do so
p=[123] not correct
p[0=123 correct
[ - is the numer of element in vector
one example
I am not sure if I understand what you intend.
If you want a variable to have a specific value you simply assign it via := as you have done quite often in your sheet.
If you want the value of a fraction a/l to become a specific value you have to change the values of nominator and/or denominator accordingly.
If you want Mathcad to tell you in which way you should change, say, a to get the result you want, you may use a solve block.
VERY simple example:
For simple things you may also use the root command to do to the job
