Dplvar

Syntax
Sets one symbolic variable name and assign a value:

Sets multiple symbolic variable names and assigns values to them (one after the other):

Assigns a value only if the variable is empty / has not been used so far:

Returns the current value of the variable:

Example
Result:
 * a=
 * b=
 * c=
 * d=

Notes:
 * Variable "c" was set to "cccc" because it was set but with an empty note (empty value).
 * Variable "d" was set to "dddd" because it was not already set.