Home Online Manual
Top
Back: string declarations
Forward: string type cast
FastBack: ring
FastForward: vector
Up: string
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

4.20.2 string expressions

A string expression is:

  1. a sequence of characters between two unescaped quotes (")
  2. an identifier of type string
  3. a function returning string
  4. a substring (using the bracket operator)
  5. a type cast to string (see string type cast)
  6. string expressions combined by the operation +.


Example:

 
// string_expression[start, length] : a substring
// (possibly filled up with blanks)
// the substring of s starting at position 2
// with a length of 4
string s="123456";
s[2,4];
==> 2345
"abcd"[2,2];
==> bc
// string_expression[position] : a character from a string
s[3];
==> 3
// string_expression[position..position] :
// a substring starting at the first position up to the second
// given position
s[2..4];
==> 2 3 4
// a function returning a string
typeof(s);
==> string

See Type conversion and casting