What is a single double argument. How does it work.

Question

Argument

Answer 1

A single, double type argument?

Answer 2

Thanks. Have you got an example. I have to do one for a labour charge and sets the value to this argument.

All i know is labour chare is £ per square meter

Answer 3

Take this for example

https://code.sololearn.com/cJ8536XtAT20/?ref=app