High-level Programming Language (Pascal)

Strings (Sequences of Characters)

String constant

• is a sequence of characters enclosed in single quotation marks, the quotation marks themselves are not part of the string
• some examples,

  'Pascal'
  'Programming'
  'Hello, how are you ?'
  'Tom''s computer' (represents the string Tom's computer)

• declaration of string constant

const Message = 'Error ! Please try again.'

String variable

• identifier string is a predefined data type in Pascal, can be used to declare string variables in the var declaration part
• for example,
  
  

  var	Name : string [25];	{declared as a string variable which can hold up to 25 characters}
  	Class : string [2];	{declared as a string variable which can hold up to 2 characters} {the integer enclosed in the square brackets specifies the maximum number of characters in a value for the string variable}
  	Address : string;	{if the length is not specified, it is assumed a default maximum length of 255 characters}