JSTL fn:toLowerCase() Function

JSTL toLowerCase Function returns String that contains all characters in lower case. The fn:toLowerCase() function converts all the characters of a string to lowercase.

The fn:toLowerCase() function has following syntax:
java.lang.String toLowerCase(java.lang.String)


Following is the example to explain the functionality of this function:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>JSTL ToLowerCase Function Example</title>
  <c:out value="${fn:toLowerCase('Dinesh Rajput')}"/>

Output: dinesh rajput

As you can see above, fn:toLowerCase() takes a String as input parameter. It converts all characters in that String to lower case and returns it with all lower case characters.

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