Strings are delimited with quotation marks, ". A character
is a string of length one.
Do not confuse " with ’ (or
quote) which is used to prevent evaluation
of an expression (see Section 6.12.4). For example, "a"
returns a string with one character but ’a’ or
quote(a) returns the variable a unevaluated.
When a string is entered on a command line, it is evaluated to itself, hence the output is the same string. You can use + to concatenate two strings or a string and another object (where the other object will be converted to a string, see Section 6.3.12).
Examples.
You can refer to a particular character of a string using index notation, like for lists (see Section 6.40). Indices begin at 0 in Xcas mode, 1 in other modes.
Example.
Input:
Output: