During processing the value inside the box is used to store the value, while allowing the value to be retrieved when necessary. All variables are considered to be global variables. If an initial value has not been specified, a scalar variable will be set to 0, or the null string, while a list variable will use the empty list as its initial value. Expression Form for Scalar Constant Scalar is a general term for character strings and numeric values. Floating point numbers are described in decimal notation.
Variable expansion depends on the character context.
It should be noted that when a list variable is placed within a string, it will be evaluated according to the character context. The direct line feed character cannot be described within the script definition character strings, i.e. it is necessary to describe the character string in one line at the top of the script definition file. Therefore, characters with a special meanings are described as escape characters. Escape Characters 7. However, in the case of a single list element, the Plangent interpreter will assume it is a scalar enclosed in brackets, because it will not know how to turn it into a list value.