What does the Fortran 77 command 'write' do and how is it used?

[Triscas]

Hello,

I'm new using fortran and I don't know what does it mean:

write (4,*) ' '
write (4,310)
write (4,311)

this lines go consecutive in the programm I have to understand.

- might say that 4 is not a reference to a line of the code.
- 310,311 are references about how the format should be

i.e:
310 format('Distance C Elec C Sol Surf Liq Pot Solid Pot ',
&'Liq Cur j main j side 1 j side 2 j side 3')
311 format('(microns) (mol/m3) x or y (V) (V) ',
1' (A/m2) (A/m2) (A/m2) (A/m2) (A/m2)')



I hope someone can help. Thanks

 

[Mark44]

Hello,

I'm new using fortran and I don't know what does it mean:

write (4,*) ' '
write (4,310)
write (4,311)

this lines go consecutive in the programm I have to understand.

- might say that 4 is not a reference to a line of the code.
- 310,311 are references about how the format should be

i.e:
310 format('Distance C Elec C Sol Surf Liq Pot Solid Pot ',
&'Liq Cur j main j side 1 j side 2 j side 3')
311 format('(microns) (mol/m3) x or y (V) (V) ',
1' (A/m2) (A/m2) (A/m2) (A/m2) (A/m2)')

All of your write statements send output to unit 4, the first number in the parentheses.
write (4,*) ' ' -- prints a single space (' ') on unit 4, using a default format.
write (4,310) -- prints the string in the format statement in line 310, on unit 4. This string appears to be a header of some sort.
write (4,311) -- prints the string in the format statement in line 311, on unit 4. This string also appears to be some sort of header.

 

[Triscas]

All of your write statements send output to unit 4, the first number in the parentheses.
write (4,*) ' ' -- prints a single space (' ') on unit 4, using a default format.
write (4,310) -- prints the string in the format statement in line 310, on unit 4. This string appears to be a header of some sort.
write (4,311) -- prints the string in the format statement in line 311, on unit 4. This string also appears to be some sort of header.

what does unit 4 mean? The values will have a length of 4 characters?

yes, i also understood they're a header the other outputs. The second might be the units of the first

 

[Mark44]

what does unit 4 mean?

The unit number indicates which device you want to write to. In this case it would probably be a disk file that was assigned a unit number with an OPEN statement.

The values will have a length of 4 characters?

yes, i also understood they're a header the other outputs. The second might be the units of the first

 

[Triscas]

The unit number indicates which device you want to write to. In this case it would probably be a disk file that was assigned a unit number with an OPEN statement.

Thanks for the answer, Mark.