index()

Deprecated in 5.0.

Replaced with method indexOf() of the string instance.

index(string, substring, position): int

Returns the position of the first occurrence of substring in string at or after position if specified. All index values are 1-based (i.e. the first character has index 1, not 0).

Table 1. Parameters
string	String	The string which will be examined.
substring	String	The string which we will search for.
position	Integer	The starting position in the string to begin our search from the left. Optional parameter

Return

Integer value of the position substring was found at, will return 0 if not found.

println(index("abcdef","cd")); //Will print "3"
println(index("abcdef","cd",4)); //Will print "0"
println(index("abcdefabcdef","cd",4)); //Will print "9"