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The ReadString(file) command reads a whitespace delimited string from file.

If file is the name of a file that has not been opened, Maple attempts to open the file before reading the character.

An error is raised if file is not a valid descriptor or if it is the name of a file that cannot be opened.

If the end of the file has been reached, ReadString returns NULL. To determine if the end of file has been reached, use AtEndOfFile .

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{WriteString}\right]\left(''testfile''\,''This\; is\; a\; test\backslash n''\right)$

$15$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{Close}\right]\left(''testfile''\right)\:$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{ReadString}\right]\left(''testfile''\right)$

$''This''$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{ReadString}\right]\left(''testfile''\right)$

$''is''$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{ReadString}\right]\left(''testfile''\right)$

$''a''$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{ReadString}\right]\left(''testfile''\right)$

$''test''$

$\mathrm{FileTools}\left[\mathrm{Text}\right]\left[\mathrm{ReadString}\right]\left(''testfile''\right)$