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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Null Data Type</title> </head> <body> <script> let a = null; document.write(a + "<br>"); // Print: null let b = "Hello World!" document.write(b + "<br>"); // Print: Hello World! b = null; document.write(b) // Print: null </script> </body> </html>
