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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Javascript Converting Values to Boolean</title> </head> <body> <script> alert(Boolean(0)); // returns false alert(Boolean(null)); // returns false alert(Boolean(false)); // returns false alert(Boolean(undefined)); // returns false alert(Boolean(NaN)); // returns false alert(Boolean("")); // returns false alert(Boolean("0")); // returns true alert(Boolean(1)); // returns true alert(Boolean(true)); // returns true alert(Boolean("false")); // returns true alert(Boolean("Hello World!")); // returns true alert(Boolean(" ")); // returns true </script> </body> </html>