Error with For Loop Return Value

[ptc-5801425]

I apologize in advance if this is an easy quick, but I am new to Mathcad. I found the attached For Loop example online and would like to modify it to use, however I am receiving the following error "Variable is undefined." I copied the example verbatim and from what I could find online, the syntax looks correct. Can anyone provide comments on why I am receiving this error?

Thanks.

[MikeArmstrong · Accepted solution]

Firstly never apologise for asking questions.

Have a look if the attached helps. You use text subscript instead of a vector subscript (keystroke [ ) operator.

[RichardJ]

Firstly never apologise for asking questions.

Never? Even if, for example, you asked your wife why it was such a big deal that you forgot your 10th wedding anniversary?

[MikeArmstrong]

Brilliant.

I think would have to come under the 'rhetorical question' category though.

[StuartBruff]

Mike Armstrong wrote:

Never? Even if, for example, you asked your wife why it was such a big deal that you forgot your 10th wedding anniversary?

Brilliant.

I think would have to come under the 'rhetorical question' category though.

Nah. That's comes under the "impossible question" category. Who'd live long enough to ask it, already?

[ptc-5801425]

Thank you Mike.

[MikeArmstrong]

No problem at all, you are welcome.