file_size

Gamma: Version 4.0
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# `file_size`

`file_size` -- gives the file size.

## Syntax

    file_size (filename)

## Arguments

`filename`

  A file name as a string, as defined by the operating system.

## Returns

The size of the file in bytes if the file exists and is readable, else nil.

## Example

        Gamma> file_size("myfile.dat");
        1467
        Gamma> file_size("non_existing.file");
        nil
        Gamma> file_size("unreadable.file");
        nil
        Gamma>

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