Introduction to the use of charAt() method in JavaScript

Introduction to the use of charAt() method in JavaScript_Basic knowledge

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Release： 2016-05-16 15:56:17

Original

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This method returns the character from the specified index.

Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character in a string called stringName is stringName.length- 1.
Grammar

string.charAt(index);

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Here are the details of the parameters:

Index: An integer between 0 and 1 that is less than the length of the string.

Return value:

Returns the character from the specified index.
Example:

<html>
<head>
<title>JavaScript String charAt() Method</title>
</head>
<body>
<script type="text/javascript">
  var str = new String( "This is string" );
  document.writeln("str.charAt(0) is:" + str.charAt(0)); 
  document.writeln("<br />str.charAt(1) is:" + str.charAt(1)); 
  document.writeln("<br />str.charAt(2) is:" + str.charAt(2)); 
  document.writeln("<br />str.charAt(3) is:" + str.charAt(3)); 
  document.writeln("<br />str.charAt(4) is:" + str.charAt(4)); 
  document.writeln("<br />str.charAt(5) is:" + str.charAt(5)); 
</script>
</body>
</html>

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This will produce the following results:

str.charAt(0) is:T 
str.charAt(1) is:h 
str.charAt(2) is:i 
str.charAt(3) is:s 
str.charAt(4) is: 
str.charAt(5) is:i

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Introduction to the use of charAt() method in JavaScript_Basic knowledge