lastIndexOf Method

See Also                  Applies To

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Description

Returns the last occurrence of a substring within a String object.

Syntax

strVariable.lastIndexOf(substring, startindex)
"String Literal".lastIndexOf(substring, startindex)

The lastIndexOf method syntax has these arguments:

Part	Description
substring	The substring to search for within the String object.
startindex	An optional integer value specifying the index to begin searching within the String object. If omitted, searching begins at the end of the string.

Remarks

The lastIndexOf method returns an integer value indicating the beginning of the substring within the String object. If the substring is not found, a -1 is returned.

If startindex is negative, startindex is treated as zero. If it is larger than the greatest character position index, it is treated as the largest possible index.

Searching is performed right to left. Otherwise, this method is identical to indexOf.

The following example illustrates the use of the lastIndexOf method:

function lastIndexDemo(str2)
{
  var str1 = "BABEBIBOBUBABEBIBOBU"
  var s = str1.lastIndexOf(str2);
  return(s);
}

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