A type determines the operations you can perform on its values; for example, adding strings doesn't exist in Red:
;-- see Chapter03/converting-types.red:"12" + "34"*** Script Error: + does not allow string! for its value1 argument*** Where: +
If what we really meant was adding two integers, then we must first convert the strings to integers with to-integer:
(to-integer "12") + (to-integer "34") ; == 46
What happens if you remove the first pair of parentheses? Could you explain this?
When we remove the first pair of parentheses like in to-integer "12" + (to-integer "34") , we get the *** Script Error: + does not allow string! for its value1 argument. This is because + cannot add the string "12" to the integer 34.
Here are ...
