javascript字符串单引号与双引号的区别

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最近在使用javascript编程,遇到使用字符串的情况

写了一点测试代码

        var str = 'This is Jack';        var str2 = "This is Tom";        var str3 = 'This is "Rose"';        var str4 = "This is 'LiLi'";        var str5 = "This is \"Sun\"";        var str6 = 'This is \'Mary\'';        var str7 = "This is \'Lucy\'";        var str8 = 'This is \"Rooney\"';        var str9 = 'This is \\Ronaldo\\';        console.log(str);        console.log(str2);        console.log(str3);        console.log(str4);        console.log(str5);        console.log(str6);        console.log(str7);        console.log(str8);        console.log(str9);

测试结果：

This is Jack
This is Tom
This is "Rose"
This is 'LiLi'
This is "Sun"
This is 'Mary'
This is 'Lucy'
This is "Rooney"
This is \Ronaldo\

结论：（1）只使用字符的字符串，单引号和双引号没有区别

（2）在单引号包括的字符串中可以直接用双引号，在双引号包括的字符串中可以直接用单引号

（3）如果在双引号包括的字符串中用双引号，需要用反斜杠转义，注意是"\" ;同样在单引号包括的字符串中用单引号，也需要转义

（4）如果要用反斜杠，则输入‘\\’

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