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FMT what does it mean?

FMT what does it mean?

(OP)
Hi all,
I'm new fortran user and i wanted to ask what FMT means in following line:

WRITE(1,FMT=varfmt)(i*1.,i=1,imxcol,1)?

Thanks for help

RE: FMT what does it mean?

Format

RE: FMT what does it mean?

To be a little bit more precise than GerritGroot, even if his answer is in the same time short and correct, it exists three types of format when writing to (reading from) a formatted file :

- fmt=* : list directed format, which produces an output which is partly compiler dependent,

- fmt=label : the label is a integer value (10, 999 ...) which points to a specific FORMAT instruction associated to that label. In that case, the format is fixed (determined at compile time)

- fmt=variable_name : in that case, the format may be defined at run time and is represented by the contents of a CHARACTER variable.

Taking into account the instruction you have provided, it seems that you are using the third case.

Two additional remarks :

- the syntax 'fmt=' is optional if the format is provided in second position, like your example.

- a format follows rather complicated rules : you need to read the documentation before being able to create your own format.

RE: FMT what does it mean?

(OP)
Thank you all for help:)
I've got one more question and please correct me if I am wrong.In the instruction "fmt" means format and "varfmt" is a name of format created by user.Is that correct?

RE: FMT what does it mean?

Yes, that's correct varfmt must be a string like
'(A3,F15.10,E20.15)' for example.

You can try findng out with WRITE(*,*)varfmt if you don't want to look it up in the code...   ..or WRITE(*,FMT='(A)')varfmt talking about formats...

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