Can I consider “whole word” as the word with space separated only in notepad++?
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 Currently, if I have the following text 5 0.5 4 Then I do a “whole word only” replacement for 5 to 9, I will get 9 0.9 4 instead of 9 0.5 4 So how can I get 9 0.5 4? Is this doable within Notepad++? 
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 This looks like a normal search and replace mode action. I’ve done this, but it’s been a while; You might have to use a special char for <sp>; but, probably not, as long as the search string and replacement string contains the space and the whole string as you wrote, it should work… Since you didn’t try; I’d say just try it, and make sure you have a backup of the file in case it goes wrong. I think there’s a special extended case for a <sp> but not sure what it is. If normal doesn’t work, that’ll work; but, you’ll have to use the Search mode: extended to do it at worst case. I"m working on learning RegEx (Regular Expression) search mode; it’s tough but doable. At least give ‘Normal’ search a try… 
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 Yeah, using regex, I’m still picking up on that… still I don’t know why a simple search and replace wouldn’t work on that. Guess I’d have to give it a try to find out. ;-) So, perhaps I misunderstood the question. Nope, it works. Search 5 0.5 4 replace: 9 0.5 4 using normal 
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 Hi @lanselibai, Sure that regexes can sort out all the cases where a 5digit must be replaced by a9digit !!So, given the 10 numbers, below, containing one or several 5digits :52.8 3.457 505 10.5 5 0.345 23558 56789.5512557 5555.5555 0.000000005Which are the final expected form of each number ? Of course, I suppose that, in real files, these 10 numbers may lie in a single or on several lines From the results, It should be easy enough to build up the appropriate regex ! Best Regards guy038 

