From XL Help ("Match")

MATCH
....
Syntax
MATCH(lookup_value,lookup_array,match_type)
....
Match_type is the number -1, 0, or 1. Match_type specifies how
Microsoft Excel matches lookup_value with values in lookup_array.

If match_type is 1, MATCH finds the largest value that is less than or
equal to lookup_value. Lookup_array must be placed in ascending order:
....-2, -1, 0, 1, 2, ..., A-Z, FALSE, TRUE.

If match_type is 0, MATCH finds the first value that is exactly equal
to lookup_value. Lookup_array can be in any order.

If match_type is -1, MATCH finds the smallest value that is greater
than or equal to lookup_value. Lookup_array must be placed in descending
order: TRUE, FALSE, Z-A,...2, 1, 0, -1, -2,..., and so on.

If match_type is omitted, it is assumed to be 1.



In article ,
Sal wrote:

Hi
Can you please tell me what the 0 stands for at the end of this formula?

=INDEX(A2:A6,MATCH("Belfast",C2:C6,0))

Thank you.
S