What is "string"

A "string" or string is a string, usually used to represent words, phrases, or texts in a program.

In most programming languages, the strings can be expressed either literally or through some kind of variable. When expressed through variables, the content of the string can usually be changed by the inclusion/exclusion of elements or by the substitution of their elements by other elements, forming a new string.

Basically it is like a type of data and is usually implemented through an arrangement of bytes which stores chain elements in sequence, using some pre-established encoding.