The operator returns a string or list that consists of the first operand followed by the second.
[ ] // string concatenation
[ ] STRING sFirstName = "Bullwinkle"
[ ] STRING sLastName = "Moose"
[ ] // " " writes a space
[ ] STRING sFullName = sFirstName + " " +sLastName
[ ]
[ ]
[ ] // Prints: Bullwinkle Moose
[ ] Print (sFullName)
[ ]
[ ]
[ ] // list concatenation
[-] LIST lsMelon = {...}
[ ] "watermelon"
[ ] "cantaloupe"
[ ]
[-] LIST lsBerry = {...}
[ ] "strawberry"
[ ] "raspberry"
[ ]
[ ] LIST lsFruit = lsMelon + lsBerry
[ ] Print (lsFruit)
[ ]
[ ]
[ ] // Prints:
[ ] // {watermelon, cantaloupe, strawberry, raspberry}