Problem with Laplace transform

[Joe Horn]

(09-29-2020 10:51 PM)Grayhek Wrote:  

(09-29-2020 10:42 PM)Joe Horn Wrote:  I'm guessing that you have a zero stored in 'x'. Try again after purge(x).

purge(x) returns "No such variable x"
But when I run x it does return a number such as 0 or whatever is stored. I cleared all of the data on the calculator and then it worked but I deleted all my programs which I don't like. Purge does not seem to find or clear 'x'.

Sounds like the difference between 'X' and 'x' is not well understood, not to mention the difference between Home and CAS. If purge(x) says "No such variable x" then you CANNOT get a value by executing x (lowercase letter x). But you will ALWAYS get a value after executing X (uppercase letter X) because X is a permanently existing Home variable which always contains a real number, and cannot be purged. It's not intended for symbolic math work, which is done in CAS using lowercase variables.