Futurebasic/language/string expressions

String Expressions Revised for FBtoC 15 February 2008 Description A string expression is anything that can be evaluated as a string of 0 to 255 characters. (Note that FutureBASIC also provides "Containers" with 2GB text capacity that operate very similarly to a standard string). A string can be expressed in any of the following ways: Simple Expressions <li type="disc">A string literal, or a string variable. See Appendix C: Data types and Data Representation, for more information. Examples: surname$(23) "Friday" <li type="disc">A reference to any user-defined function that returns a string value. Example: fn MyStringFunc$( "something" ) <li type="disc">A value returned by any built-in FB function whose name ends with $ Examples: chr$( 7 ) hex$( z& ) <li type="disc">A value returned by the using function, or by the str# function. Examples: using "##.#"; pi str#( 130, 5 ) Compound Expressions A compound string expression is a list of simple string expressions separated by the concatenation operator "+". The syntax of a compound string expression is: simpleExpr1 + simpleExpr2 [+ simpleExpr3 ...] The "+" operator builds a longer string by concatenating the operands. For example: "Ex" + "tra" + mid$( "fiction", 3 ) This expression has the value "Extraction". Notes If a string expression is assigned to a string variable too small to hold it, the expression is silently truncated to fit. When two string expressions are separated by a data-comparison operator (==, !=, <, >) the result is a numeric expression. See Appendix D: Numeric Expressions.