Fortran 90 read file example

Before using a file you must open the file. The open command is used to open files for reading or writing. The unit number u could be any number in the range and it indicates the file, you may choose any number but every open file in the program must have a unique number.

If the open statement is successful then the ios value returned is zero else a non-zero value. It shows the prior status of the file. A scratch file is created and deleted when closed or the program ends. It is the file access mode. It gives the formatting status of the file. After the file has been opened, it is accessed by read and write statements. Once done, it should be closed using the close statement.

When the above code is compiled and executed, it creates the file data1. The best way, if you have the memory for it, is to read in the whole file into an array of lines, then reverse the array in-memory. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Read from end of file in Fortran 90 Ask Question. Asked 3 years ago. Active 3 years ago. Viewed 1k times.

My question is how to read beginning from the end of a text file. Improve this question. Vladimir F Add a comment. Active Oldest Votes. Improve this answer. Amadan Amadan k 19 19 gold badges silver badges bronze badges. Thanks for your response. How would I jump to a certain line? Say I'm searching line-by-line for a particular number in a file, but I know that it's somewhere after the first , lines.

In the same way, you could say that if you knew the average line length to be e. I understand now. Of course, it's possible to read a file from its end to its first character. Show 6 more comments. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.