Best practise to reset a variable: What is the best practice to reset a variable? For example if I have a variable
V[x], Set V[stName] "" or Set V[x]

If it is a numeric variable should I use
Set V[x] 0

The statements
Set V[x] ""
Set V[x]
carry out the same function. Personally I prefer
Set V[stName] ""
since it makes it clear that you haven't forgotten to specify a value.

The notation
V[x] 0
is fine if you add some values to this variable later on.

In some situations it makes sense to distinguish between 0 (which means zero) and "" (which means "nothing" or "not yet set") and in this case the empty string "" is a reasonable initial value for variables with a numeric value.