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                substring 與substr方法 <br/> <br/> 概述:他們兩者也是字符串方法,他們主要作用是: <br/> <br/> substring:它是字符串方法,主要作用是在父串中切割一個子串。 <br/> <br/> 變量名稱.substring(起始索引值,結束索引值)包含起始索引值,不包含結束索引值 <br/> <br/> substr:它也是字符串方法,它主要的作用也是從父串當中切割一個子串。 <br/> <br/> 變量名稱.substr (起始索引值,切割長度); 語法: ![](https://img.kancloud.cn/c2/21/c221037aa5aa428ffd246d911253d9e0_695x276.png) ``` <script type="text/javascript"> var s="我在學習JS基礎語法,將來學習DOM可以實現很多東西"; var bs=s.substr(1,3); console.log(bs); </script> ``` 效果: 變量名稱.substring 它是字符串方法,主要作用是在父串中切割一個子串。 變量名稱.substring(起始索引值,結束索引值)包含起始索引值,不包含結束索引值 ``` <script type="text/javascript"> var s="我在學習JS基礎語法,將來學習DOM可以實現很多東西"; var bs=s.substring(1,3); console.log(bs); </script> ``` 效果: ![](https://img.kancloud.cn/a9/e0/a9e078036f4e249cd4aa7ad2ae92fbf9_694x263.png)
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