When creating variables, it would be really useful to be able to include maths and text when defining a variable, which are kept up-to-date based on current values.
E.g.
With a shopping basket, I have the following variable
• Subtotal# (numeric)
Into which I add the value of each product selected in the basket.
From this value I would like to calculate
• VAT# (numeric) = Subtotal * 20%, truncated to 2 decimal places
And then display these variables in a currency
• Subtotal£ (String) = “£” + Subtotal#
• VAT£ (String) = “£” + VAT#
• Total£ (# String) = “£” + Subtotal#+VAT#
This way, I could just add/remove the product costs from Subtotal#, and use the strings for display in the prototype.