HTML and CSS #W3# HTML Learn CSS Learn W3. 0, share the same functions library. However, since fn: is the default prefix of the namespace, fn bea patchize cdata function names do not need to be prefixed when called. Returns the numeric value of the argument.
Returns the string value of the argument. Result: ‘ We are having fun! Returns the substring from the start position to the specified length. Index of the first character is 1. Returns the length of the specified string.