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JavaScript Operator Precedence 运算符优先级
tryjs_arithmetic_precedence2
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<!DOCTYPE html> <html> <body> <p>乘法优先于加法。</p> <p>But parenthesis has precedence over multiplication.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = (100 + 50) * 3; </script> </body> </html>