Perl index Function

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Description

This function returns the position of the first occurrence of SUBSTR in STR, starting at the beginning (starting at zero), or from POSITION if specified.

Syntax

Following is the simple syntax for this function:

index STR, SUBSTR, POSITION

index STR, SUBSTR

Return Value

This function returns -1 on failure otherwise Position of matching string (starting at zero for the first character).

Example

Following is the example code showing its basic usage:

#!/usr/bin/perl

$string = "That is test";

$index = index ($string, 'is');

print "Position of is in the string $index\n";

When above code is executed, it produced following result

Position of is in the string 5


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