代码编辑器:
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<p>该实例调用函数并输出 PI 值:</p>
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<p id="demo"></p>
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<script>
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function myFunction() {
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return Math.PI;
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}
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document.getElementById("demo").innerHTML = myFunction();
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</script>
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<p>该实例调用函数并输出 PI 值:</p>
<p id="demo"></p>
<script>
function myFunction() {
return Math.PI;
}
document.getElementById("demo").innerHTML = myFunction();
</script>