string1

#string

##Syntax A stringType is:

string [ ( maximumLength ) ]

##Description Each variable whose type is a stringType can contain a sequence (a string ) of characters. The length of this sequence must not exceed the _stringType'_s maximum length.

##Example

    var name : string
    name := "Nancy"
    var licenceNumber : string ( 6 )
    licenceNumber := "175AJN"

##Details Strings can be assigned and they can be compared for both equality and for ordering. See also string comparison and assignment statement.

Strings can be catenated (joined together) using the + operator and separated into substrings. See catenation and substring. String functions are provided to find the length of a string, to find where one string appears inside another, and to make repeated copies of a string all joined together. See length, index, and repeat.

A string type written without a maximum length is limited to holding a maximum of 255 characters.

The maximumLength of a string, if given as a part of the type, must be known at compile time, and must be at least 1 and at most 255. The maximum length of a string is given by upper, for example, upper(licenceNumber) is 6. See also upper.

In the declaration of a string that is a var formal parameter of a procedure or function, the maximumLength can be written as an asterisk (*). Here, the maximum length is taken to be that of the corresponding actual parameter, as in:

The star can also be used when the parameter is an array of strings.

    procedure deblank (var s : string (*) ).

##See also explicitStringConstants for exact rules for writing string values such as "Nancy". See also char.html(n) and char.html types.