Yes, as Eric explained these are scientific notation. I forgot to add they 
can have positive or negative sign like

+1.23e4_dp
-1.23e4_dp

1.236e+5_dp
-1.23e-5_wp



On Saturday, August 24, 2019 at 8:02:46 PM UTC+4:30, @TiddlyTweeter wrote:
>
> By "number" do you mean everything before the "_"? So "1.234e5" is a 
> number?
>
> On Saturday, 24 August 2019 17:23:55 UTC+2, Mohammad wrote:
>>
>> What is the regexp pattern (one pattern) to match any of of below numbers
>>
>> 1234_dp
>> 12.34_dp
>> 1234._dp
>>
>> 1234e5_dp
>> 1.234e5_dp
>>
>>
>>
>>
>> Note wp or dp can be any kind of string (only a-zA-Z not hyphen not 
>> underscore) like _myPrecison 
>> These are numbers with user defined precision used *fortran*!
>>
>> --Mohammad
>>
>>

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