要将字符串的小写字母转换为小写手动（如果您不手动执行，则应使用String.prototype.toLowerCase()），您...
代码如下 functionconvert(num){varresult=""while(num){result=String.fromCharCode(--num%26+65)+re...
JavaScript // JavaScript to illustratecharCodeAt() methodfunctionfunc(){letstr ='ephemeral';// Finding the code of the character at// given indexletvalue = str.charCodeAt(4);console.log(value); } func(); 输出: 109 示例3:在此示例中,方法 charCodeAt() 从索引 20 处的字符串中提取字符。由于...
Thepositionmust be between 0 andstring.length-1. If thepositionis out of bounds, the charCodeAt() method will return a specialnot-a-numbervalue printed as NaN. Note Use thecodePointAt() methodif the Unicode value of the character is not representable in a single UTF-16 code unit. ...
Similarly, the + operator is employed to add a character to the end of a string. In this example, we add the character o to the string Hell. // Original string let existingString = "Hell"; // Character to add let charToAdd = "o"; // Using the + operator to add the character ...
Note:Thestr.lengthreturns the length of a givenstring. charCodeAt() Return Value Returns a number representing the UTF-16 code unit value of the character at the given index. Notes: ThecharCodeAt()method always returns a value less than 65,536. ...
String.fromCharCode(n1,n2, ...,nX) Parameters ParametersDescription n1,n2,nXRequired. One or more Unicode values to be converted. Return Value TypeDescription A stringA string representing the unicode character(s). Tip For a list of all Unicode values, please study ourComplete Unicode Reference...
log(outputString1); console.log(outputString2); If we call charAt(0), this will copy the character W from the original string, inputString into outputString1. The above code will give you the below output.Output:"W " "J" Get the First Character of a String Using substring() in ...
Return Value: A String, representing the character(s) representing the specified unicode number(s) JavaScript Version: 1.2More ExamplesExample Convert a set of Unicode values into characters: var res = String.fromCharCode(72, 69, 76, 76, 79); The result of res will be: HELLO Try it ...
我们仍然可以通过使用“换行符(newline character)”,以支持使用单引号和双引号来创建跨行字符串。换行符写作\n,用来表示换行: let guestList ="Guests:\n * John\n * Pete\n * Mary"; console.log(guestList);//一个多行的客人列表 例如,这两行描述的是一样的,只是书写方式不同: ...