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{ Example 01: Basic Pascal - variables, arithmetic, control flow }
program Basics;
var
x, y, z: integer;
name: string;
pi: real;
flag: boolean;
begin
{ Variable assignment and arithmetic }
x := 10;
y := 25;
z := x + y * 2;
{ String assignment }
name := 'Pascal';
{ Real numbers }
pi := 3.14159;
{ Boolean logic }
flag := (x > 5) and (y < 30);
{ If/else }
if flag then
z := z + 100
else
z := z - 100;
{ While loop }
while x > 0 do
x := x - 1;
{ For loop }
for y := 1 to 10 do
z := z + y;
{ Repeat/until }
x := 5;
repeat
x := x - 1;
until x = 0;
{ Case statement }
x := 3;
case x of
1: z := 100;
2: z := 200;
3: z := 300;
else
z := 0;
end;
writeln('Basics complete. z = ', z);
end.