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Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found. The calling string is searched backward, starting at fromIndex.
Method of String
Syntax
lastIndexOf( searchValue[, fromIndex] )
Parameters
| Parameter | Description |
|---|---|
| searchValue | A string representing the value to search for. |
| fromIndex | The location within the calling string to start the search from. It can be any integer between 0 and the length of the string. The default value is the length of the string. |
Description
Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character is stringName.length - 1.
The lastIndexOf method is case sensitive. For example, the following expression returns -1: