1. CMP 131 Introduction to Computer Programming
Violetta Cavalli-Sforza
Week 4, Lab

2. Brief Review Expressions Pascal Data Types Real Ordinal Data Types
Integer
Character
Boolean

3. Integer Data Type A type Integer object represent only whole numbers.
Not all integer range can be represented inside a computer.
On each system, the predefined constant MaxInt is the largest possible integer. The smallest integer is -MaxInt-1
Objects:
Variables
Constants
Literals
Operations:
Arithmetic: + - * / div mod
div computes the integral part of the result of dividing the first operand by the second.
mod returns the integer remainder of the result of dividing its first operand by its second.
Assignment: :=
Standard procedures:
ReadLn, WriteLn, Read, Write

4. What is MaxInt? PROGRAM MaximumInteger; BEGIN
writeln('MaxInt = ', MaxInt)
END.
OUTPUTS:
MaxInt = 32767

5. Division PROGRAM Division; VAR resint, dividend, divisor : integer;
resreal : real;
BEGIN
dividend := 13; divisor := 4;
resreal := dividend / divisor;
resint := dividend DIV divisor;
write('resreal = ', resreal:5:2);
write(' resint = ‘, resint);
writeln(' mod = ', dividend MOD divisor);
readln;
END.
OUTPUTS:
resreal = resint = 3 mod = 1