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這篇文章主要介紹了JavaScript中的pow()方法使用詳解,是JS入門學習中的基礎知識,需要的朋友可以參考下
該方法返回底數的指數冪，即, baseexponent.
文法
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| 1 | Math.pow(base, exponent ) ; |
下面是參數的詳細資料：
base : 底數
exponents : 該底數的指數
傳回值:
返回到底數的指數冪，即，底數指數.
例子：
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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | <html> <head> <title>JavaScript Math pow() Method</title> </head> <body> <script type="text/javascript"> var value = Math.pow(7, 2); document.write("First Test Value : " + value ); var value = Math.pow(8, 8); document.write("<br />Second Test Value : " + value ); var value = Math.pow(-1, 2); document.write("<br />Third Test Value : " + value ); var value = Math.pow(0, 10); document.write("<br />Fourth Test Value : " + value ); </script> </body> </html> |
這將產生以下結果：
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| 1 2 3 4 | First Test Value : 49 Second Test Value : 16777216 Third Test Value : 1 Fourth Test Value : 0 |
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