Echo Command Documentation

echo

The echo command returns the data you give it back to you. It is useful for displaying messages, variables, or output in the terminal.

Example:

echo "Hello, World!"
# Outputs: Hello, World!

echo $HOME
# Outputs the value of the HOME environment variable

Screenshot:

Practical Examples

Displaying Text

To display a simple text message:

echo "Hello, World!"
# Outputs: Hello, World!

Displaying Variable Values

To display the value of an environment variable, such as HOME:

echo $HOME
# Outputs the value of the HOME environment variable

To display a custom variable value:

my_var = "Hello, OTS!"
echo $my_var
# Outputs: Hello, OTS!

Advanced Tips

• Combining Text and Variables: You can combine text and variables in the same echo command:

  user = "Alice"
  echo Hello, $user !
  # Outputs: Hello, Alice !
  

• Redirecting Output: You can redirect the output of echo to a file:

  echo "This is a test" >> variable
  # Sets a variable to the output of the echo
  

NOT IMPLEMENTED YET

• Appending to a File: Use the =>> operator to append to a file instead of overwriting it:

  echo "Another line" =>> test.txt
  # Appends "Another line" to the file test.txt
  

Redirecting Output to a File

To save a message to a file:

echo "Saving this message to a file." => message.txt
# Creates or overwrites message.txt with the content "Saving this message to a file."

Appending Output to a File

To add more content to an existing file:

echo "Adding more content." =>> message.txt
# Appends "Adding more content." to message.txt