f. read()

Read(196) Label: file object, read as a string,

Description:

Read contents of a file and return result as strings.

Syntax:

f.read(b:e)

Note:

The function reads in the contents of file f from the bth byte to the eth byte and returns the substring.

Parameters:

f

A file

b

A byte number beginning from 0

e

A byte number beginning from 0

Options:

@n

Return the contents of the file object f as a string sequence; each row is corresponding to a member.

@v

Return a sequence as the corresponding data type. The combined use of this option and @n is acceptable

@0

Read the file once and return the total number of bytes in it; used for test

Return value:

A string

Example:

 

A

 

1

=file("D:/score.txt")

 

2

=A1.read()

Read the contents of file object score.txt as a string

3

=A1.read@n()

With @n option, read and concatenate each line in the text file into a string and return it as a member of the resulting sequence

4

=file("D:/tmp2.txt")

 

5

=["Lucy","98"]

By default Lucy is a string and 98 is an integer

6

=A4.write(A5)

 

7

=A4.read@nv()

With @nv options, return a sequence consisting of rows of different data types

8

=A1.read@b()

Read the text file as the binary blob data

9

=file("atoz.txt").read()

Read in content of atoz.txt

10

=file("atoz.txt").read(2:7)

Read in content of atoz.txt from the second byte to the 7 byte

11

=file("atoz.txt").read@0()

Use @0 option to return the total number of byte in atoz.txt; the result is 26

  Related functions:

f.write()