A Brief Analysis of MySQL PHP Syntax

A Brief Analysis of MySQL PHP Syntax

Let's first look at the basic syntax of the charAt function

character = str.charAt(index)

The charAt function's only argument is the index in the string from which to extract a single character. This index ranges between 0 and length - 1, inclusive. If index is not specified, the first character of the string is returned because 0 is the default index used for this function.

The function returns the single character located at the index specified as the function argument. If the index is out of range, this function returns an empty string.

Let's take a look at the specific example of the charAt function

The code is as follows

<!DOCTYPE html>
<html>
<head>
 <title></title>
</head>
<body>
<script> 
function func() { 
  var str = 'JavaScript is an object oriented language'; 
  
  var value = str.charAt(9); 
  document.write(value);  
} 
func(); 
</script>  
</body>
</html>

The output is as follows:

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