A string is a datatype used represent literal text or character sequences rather than numeric values. A string consists of a set of characters containing letters, numerals, spaces and symbols. For example, the word "chicken", the phrase "I like hamburgers" and telephone numbers, such as "0121 234 5678" are all strings. The characters used to define a string are typically enclosed using quotationmarks in order to be recognized as a string.
literal character substitution
working with ASCII