Locates a character or String within another String. By default, searches from the end of the String, but can also work backwards from a given index, allowing for the locating of all instances of the character or String.
// SYNTAX string.lastIndexOf(val) string.lastIndexOf(val, from) // PROTOTYPES int lastIndexOf( char ch ) const; int lastIndexOf( char ch, unsigned int fromIndex ) const; int lastIndexOf( const String &str ) const; int lastIndexOf( const String &str, unsigned int fromIndex ) const;
- string: a variable of type String
- val: the value to search for - char or String
- from: the index to work backwards from
Returns: The index of val within the String, or -1 if not found. The index value is 0-based.