JavaScript Math.PI
Math.PI屬性就是π，即圓的周長和它的直徑之比。
更多內容可以參閱JavaScript Math 物件一章節。
語法結構：
[JavaScript] 純文字檢視 複製程式碼Math.PI
程式碼例項:
[JavaScript] 純文字檢視 複製程式碼執行程式碼console.log(Math.PI)
以上程式碼可以列印出對應的值。
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