Pascal Variables

Variables store values and information. They allow programs to perform
calculations and store data for later retrieval. Variables store numbers, names,
text messages, etc.

Pascal supports FOUR standard variable types, which are

• integer
  
  
• char
  
  
• boolean
  
  
• real
  

integer

Integer variables store whole numbers, ie, no decimal places. Examples of
integer variables are,

        34       6458     -90    0      1112

char

Character variables hold any valid character which is typed from the keyboard,
ie digits, letters, punctuation, special symbols etc. Examples of characters
are,

   XYZ   0ABC   RANJAN_SAID.GO;AWAY  [ ] { } = + \ | %   ( ) * $

boolean

Boolean variables, also called logical variables, can only have one of two
possible states, true or false.

real

Real variables are positive or negative numbers which include decimal places.
Examples are,

     34.265   -3.55  0.0   35.997E+11

Here, the symbol E stands for 'times 10 to the power of'

Types integer, char and boolean are called ORDINAL types

 

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