Concatenation operators

EGL offers two concatenation operators in addition to the plus sign.

You can use the following operators for concatenation:
::
This operator (two colons) converts simple, assignment compatible types to string and concatenates them; the operator can also append an element to an array. Variable length null elements are ignored; fixed length null elements are considered to be all spaces. If both operands are null, the operator returns null.
?:
This operator behaves the same way as :: except in regard to null values. If any element in the concatenation has a null value, the result will be null. This operator allows the migration of the I4GL || operator.
+
If you use + for concatenation, the left hand side of the expression determines the type of the result. If the left hand side is a numeric variable, the result will be a number; if the left hand side is a text variable, the result will be concatenated text.