Fortran How to use a variable in format statement in Fortran?

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The discussion centers on a programming challenge in Fortran, specifically regarding the use of a variable in a format statement for output. The user is attempting to print a greeting that increases in length with each iteration of a loop, but encounters difficulties when trying to incorporate the loop variable 'I' into the format statement. It is noted that variable format specifiers are not supported by the GCC Fortran compiler, as indicated by the linked documentation. The output generated by the user's code shows a progressive display of the greeting, but without the desired formatting flexibility.
manugv
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hello everyone!
I was do programming in fortran and i wanted to print my answer in the format below. I was not able to do it. I have written a part of my program also.
i.e,
#####
greeting = 'Good Morning!'
do 110 I = 1, 12
write (*,115) (greeting)
115 format (A<I>)
110 continue
end
#####
here i want to use a variable 'I' in the format statement i tried it doing but i failed. so please if anyone knows to use a variable in format statement tell me.
I use gcc-3.4.6 compiler.

output of the program
G
Go
Goo
Good
Good
Good M
Good Mo
Good Mor
Good Morn
Good Morni
Good Mornin
Good Morning
 
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