What's wrong here about Expression Component？

[user454]

Hi,
what’s wrong here about Expression? After input same expression and numbers,Expression outputs wrong result while Evaluate outputs right result. Is it a bug?

expression question.gh (1.9 KB)

[martinsiegrist]

The Expression component does not seem to distinguis between upper and lower case.

You’ll have to use a different name for either ‘R’ or ‘r’

[user454]

I agree with you completely.Thanks.
BTW,I just found that I can use R1 as Variable.I like this feature.