String Concatenation

The + operator acts in two different ways depending on the type of its two operands. If one or both of them are strings, it acts as a string concatenator. If both are numeric, it acts as an arithmetic addition.

An example of string concatenation is "one " + "world" resulting in "one world". If one of the two operands isn't a string, it is implicitly converted to a string before the + oper...