how would one clear values of variable, or change the type: for instance if I declare a = 5 and after evaluation, if I fix the statement reevaluate const a = 5, I get error that a is already defined. How would I get a out of the memory without restarting the entire kernel?
Second question is if there is a syntax error, Julia says the line number where the syntanx error is. But for a long mathematical expression it is helpful if it says the character number as well. Sometime I find this frustrating because I have mistyped one less bracket or missed a plus sign.
