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<!DOCTYPE html> <html lang="en"> <body> <pre id="output"></pre> <script> var a = 4; document.getElementById('output').innerHTML += 'a : ' + a; var result = --a; document.getElementById('output').innerHTML += '\nAfter decrement\na : ' + a; document.getElementById('output').innerHTML += '\nresult : ' + result; </script> </body> </html>
