Before revision: The most basic operation on strings is concatenation, connecting two strings to form a longer string whose length is the sum of the lengths of the operands : abcde is the concatenation of ab with cde, in symbols abcde = ab ^ cde.
After revision: The most basic operation on strings is concatenation, connecting two strings to form a longer string whose length is the sum of the lengths of those two strings : abcde is the concatenation of ab with cde, in symbols abcde = ab ^ cde.