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<p>设置 y=5, 计算出 x=y%2, 并显示结果。</p>2
<button onclick="myFunction()">点我</button>3
<p id="demo"></p>4
<script>5
function myFunction() {6
var y = 5;7
var x = y % 2;8
var demoP = document.getElementById("demo")9
demoP.innerHTML = "x=" + x;10
}11
</script>