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JavaScript 逻辑运算符
tryjs_oper_not
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<!DOCTYPE html> <html> <body> <h1>JavaScript Logical Operators</h1> <h2>The ! (NOT) Operator</h2> <p id="demo1"></p> <p id="demo2"></p> <script> document.getElementById("demo1").innerHTML = (5 == 8); document.getElementById("demo2").innerHTML = !(5 == 8); </script> </body> </html>