Write in Ruby

In Ruby, you can write to a file with the help of the File class. Here is an example of how to write to a file:

# Open the file in write mode
File.open('output.txt', 'w') do |file|
  # Write to the file
  file.write('Hello, world!')
end

In this example, we are creating a new file called output.txt if it doesn't exist and opening it in write mode ('w'). The File.open method is called with a block, and the block variable file represents the file object that we can use to write to the file.

Inside the block, we call the write method on the file object to write the string 'Hello, world!' to the file.

After the block is executed, the file is automatically closed.

You can also use the puts method to write to a file:

# Open the file in write mode
File.open('output.txt', 'w') do |file|
  # Write to the file
  file.puts('Hello, world!')
end

The puts method adds a newline character after the string, so the output will be on a new line.

You can also use the << method to write to a file:

# Open the file in write mode
File.open('output.txt', 'w') do |file|
  # Write to the file
  file << 'Hello, world!'
end

The << method works like the write method, but it appends the string to the file instead of overwriting it.