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                parseInt()會試圖將其收到的任何輸入值轉換成整數類型輸出。如果轉換失敗就返回NaN。 例如: ``` >>> parseInt('123'); 123 >>> parseInt('abc123'); NaN >>> parseInt('1abc123'); 1 >>> parseInt('123abc'); 123 ``` 該函數的第二參數是:基數 負責設定函數所期望的數字類型-十進制、十六進制、二進制等 ``` >>> parseInt('FF',10); NaN >>> parseInt('FF',16); 255 >>> parseInt('0377',10); 377 >>> parseInt('0377',8); 255 ``` - 當沒有指定第二參數時,默認是十進制 - 如果第一個參數以0開頭,第二參數默認為8
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