Fortran Fortran 90 question about reading files with text

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The discussion focuses on how to extract numerical values from a text file containing two distinct formats of data. The first format consists of text followed by numbers, while the second format features strings that start with 'is' and include multiple numerical values. The user seeks to read only the numbers without altering the text. It is suggested that DO loops can be utilized to process each format separately by counting the number of lines. The identification of the starting string 'is' in the second format can serve as a trigger to initiate the second DO loop. A tutorial with relevant source code is provided as a resource for further guidance.
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I have a file with text and adjacent to it, the number i want to read. Below is the format. I was wondering how to read just the numbers without touching the text.

trhy 30.0
difje 30.0
sdjk 66.5
xmb 15.0
dcos 15.0
fjvm 2.573e-4
srht 9.05e-3
art3 0.0
19.954
39.499
43.852
48.713
51.660
53.801
54.715
55.602

another format is:

is...o2. mw2 31.998 htf2 0.0
is...n2. mw3 28.014 htf3 0.0
is..co2. mw4 44.009 htf4 -93.965
is..h2o. mw5 18.015 htf5 -57.103

if above two formats are in the same file, can I use DO loops for first format and second format individually by counting the number of lines?
 
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if the second set always starts with 'is' then once you are able to identify strings you can use this as a starting point to start your second do loop.
I have found a tutorial with source code online. This should help you out:
http://www.cs.mtu.edu/~shene/COURSES/cs201/NOTES/chap05/class-avg.html"
 
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