How does this formula work?

Dathan

New Member
Joined
Oct 25, 2006
Messages
49
This formula works, but I don't understand it.

=LOOKUP(REPT("z",255),B1:R1)

Can someone explain how it works?

Thanks,
 

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When did Power Query debut in Excel?
Although it was an add-in in Excel 2010 & Excel 2013, Power Query became a part of Excel in 2016, in Data, Get & Transform Data.

Jonmo1

MrExcel MVP
Joined
Oct 12, 2006
Messages
44,061
Rept("z",255) will produce text of

zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.....on and on 255 characters long...

it's just an outrageous text string that couldn't possibly exist in the range B1:R1..

so lookup("zzzz...",B1:R1)
Lookup Searches for Closest match if there is no exact match.. Therefore looks for CLOSEST match not EXACT match..

so it will always return the last text string in the range (furthest Right, or Furthest Down, depending on the range in the formula)...
 

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