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Ruby program to read the specified number of characters from the existing file

Last Updated : December 15, 2025

Problem Solution

In this program, we will open an existing file using the File class in read ("r") mode. Then we will read the specified number of characters from the existing file using the sysread() method of the File class and print the result.

Program/Source Code

The source code to read the specified number of characters from the existing file is given below. The given program is compiled and executed on Windows 10 Operating System successfully.

# Ruby program to read the specified 
# number of characters from 
# the existing file

# Open an existing file.
fobj = File.new("MyFile.txt", "r"); 

# Read 5 character from "MyFile.txt" file.
print "File Text: ",fobj.sysread(5);

# Close file object
fobj.close();  

Output

File Text: Sampl

Explanation

In the above program, we opened an existing file "MyFile.txt" by creating object fobj of the File class. Then we read 5 characters from the "MyFile.txt" file and printed the data. After that, we closed the open file.

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