read a line from a file - Maple Help

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FileTools[Text][ReadLine] - read a line from a file

Calling Sequence

ReadLine(file)

Parameters

file

-

file descriptor or filename

Description

• 

The ReadLine(file) command reads a string containing all the characters from the current file position to the first newline character or the end of file.  The characters are returned as a string.

• 

If the current file position is the end of the file, a call to ReadLine returns NULL, but ReadLine does not automatically close file. This behavior is different from readline.

Examples

FileTools[Text]WriteLinetestfile,This is a test

15

(1)

FileTools[Text]WriteLinetestfile,This is also a test

20

(2)

FileTools[Text]Closetestfile

FileTools[Text]ReadLinetestfile

This is a test

(3)

FileTools[Text]ReadLinetestfile

This is also a test

(4)

FileTools[Text]ReadLinetestfile

FileTools[Remove]testfile

See Also

file, FileTools[Remove], FileTools[Text], FileTools[Text][Close], FileTools[Text][Open], FileTools[Text][WriteLine], FileTools[Text][WriteString], IO_errors, readline


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