GetVariable(String)

Getvariable retrieves the value of a variable. As it takes an expression as a parameter, variables which names are not known in advance can be retrieved effortlessly.

Return value:
A string if the variable exists, otherwise an empty string.

Example:

my_var = "Hi Everybody!!" $
a = getVariable("my_" + "var") $
print("a=", a$, "\n")

a=Hi Everybody!!