How to return last index position of a substring

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi,
I want to return the last position of the occuring substring in the string:

#             3  6 
my $str = 'GCCGCTGCTGCTG';
my $sbst ='GCTGC';

my $pos = index($str,$sbst);
[download]

But my code above return 3 instead of 6. How can we achieve that?

Comment on How to return last index position of a substring Download Code

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Re: How to return last index position of a substring by graff (Chancellor) on Aug 22, 2007 at 07:48 UTC
I think you just need to check out rindex.	[reply]