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Pascal was designed in 1970 by Niklaus Wirth as a language for teaching structured programming. It dominated CS education in the 80s and 90s. Today Free Pascal (FPC) keeps the dialect alive and is what Judge0 uses.

program Hello;
begin
    WriteLn('Hello, Pascal!');
end.

The shape of every Pascal program:

• program Name; — declares the program (mostly for documentation)
• begin ... end. — the main block. Note the trailing .
• Statements end with ; (separator, not terminator — the last end. doesn't need a ;)
• Strings use single quotes only. Double quotes don't exist.
• Identifiers are case-insensitive: WriteLn = writeln = WRITELN
• Comments: { ... } or (* ... *)