string

Returns the number of characters in the string.

Tests whether two strings are equal. Returns true if they are, otherwise false.

Concatenates two strings to form a new string. Returns the new string.

Returns the index of the first/last occurrence of Character in String. 0 is returned if Character does not occur.

Returns the position where the first/last occurrence of SubString begins in String. 0 is returned if SubString does not exist in String. For example:

> string:str(" Hello Hello World World ", "Hello World").
8        

Returns the length of the maximum initial segment of String, which consists entirely of characters from (not from) Chars.

For example:

> string:span("\t    abcdef", " \t").
5
> string:cspan("\t    abcdef", " \t").
0        

Returns a substring of String, starting at the position Start, and ending at the end of the string or at length Length.

For example:

> substr("Hello World", 4, 5).
"lo Wo"        

Returns a list of tokens in String, separated by the characters in SeparatorList.

For example:

> tokens("abc defxxghix jkl", "x ").
["abc", "def", "ghi", "jkl"]        

Returns a string with the elements of StringList separated by the string in Separator.

For example:

> join(["one", "two", "three"], ", ").
"one, two, three"        

Returns a string consisting of Number of characters Character. Optionally, the string can end with the string Tail.

Returns a string containing String repeated Number times.

Returns the number of words in String, separated by blanks or Character.

For example:

> words(" Hello old boy!", $o).
4        

Returns the word in position Number of String. Words are separated by blanks or Characters.

For example:

> string:sub_word(" Hello old boy !",3,$o).
"ld b"        

Returns a string, where leading and/or trailing blanks or a number of Character have been removed. Direction can be left, right, or both and indicates from which direction blanks are to be removed. The function strip/1 is equivalent to strip(String, both).

For example:

> string:strip("...Hello.....", both, $.).
"Hello"        

Returns the String with the length adjusted in accordance with Number. The left margin is fixed. If the length(String) < Number, String is padded with blanks or Characters.

For example:

> string:left("Hello",10,$.).
"Hello....."        

Returns the String with the length adjusted in accordance with Number. The right margin is fixed. If the length of (String) < Number, String is padded with blanks or Characters.

For example:

> string:right("Hello", 10, $.).
".....Hello"        

Returns a string, where String is centred in the string and surrounded by blanks or characters. The resulting string will have the length Number.

Returns a substring of String, starting at the position Start to the end of the string, or to and including the Stop position.

For example:

sub_string("Hello World", 4, 8).
"lo Wo"        

Argument String is expected to start with a valid text represented float (the digits being ASCII values). Remaining characters in the string after the float are returned in Rest.

Example:

          > {F1,Fs} = string:to_float("1.0-1.0e-1"),
          > {F2,[]} = string:to_float(Fs),
          > F1+F2.
          0.9
          > string:to_float("3/2=1.5").
          {error,no_float}
          > string:to_float("-1.5eX").
          {-1.5,"eX"}

Argument String is expected to start with a valid text represented integer (the digits being ASCII values). Remaining characters in the string after the integer are returned in Rest.

Example:

          > {I1,Is} = string:to_integer("33+22"),
          > {I2,[]} = string:to_integer(Is),
          > I1-I2.
          11
          > string:to_integer("0.5").
          {0,".5"}
          > string:to_integer("x=2").
          {error,no_integer}