Objectives for Section 1

After studying this section you should be able to do the following.

• Recognise the terminology: character; string; integer; sequence; element (of a sequence); variable; identifier (of a variable); state (of a variable).
  
• Use and interpret the notational conventions:
  
  • single inverted commas to show a character;
    
  • double inverted commas to show a string (sequence of characters);
    
  • ‘’ to make explicit a space character;
    
  • the brackets [ and ] to delimit a sequence.