NetLogo Help: file-read

### file-read2.0

#### file-read

This reporter will read in the next constant from the opened file and interpret it as if it had been typed in the Command Center. It reports the resulting value. The result may be a number, list, string, boolean, or the special value nobody.

Whitespace separates the constants. Each call to file-read will skip past both leading and trailing whitespace.

Note that strings need to have quotes around them. Use the command file-write to have quotes included.

Also note that the file-open command must be called before this reporter can be used, and there must be data remaining in the file. Use the reporter file-at-end? to determine if you are at the end of the file.

    file-open "my-file.data"
    print file-read + 5
    ;; Next value is the number 1
    => 6
    print length file-read
    ;; Next value is the list [1 2 3 4]
    => 4

Note: This primitive is not compatible with NetLogo Web. If you wish to read the contents of a file with the same code and the same behavior in both NetLogo and NetLogo Web, see fetch:user-file-async.

See also file-open and file-write.

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