Python Program to Print Output Without a Newline

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When working with Python, you’ll often find yourself in situations where you need to print output. The default behavior of Python’s built-in print function is to add a newline character at the end, meaning each call to print will print the argument followed by a newline (\n). However, there are scenarios where you might want to avoid this, for example when printing data in a single line or creating a progress bar.

This comprehensive article will cover the techniques available in Python to print output without a newline and delve into the specifics of each approach.

The Basics: Python print Function

Before diving into the advanced options, let’s look at the basics. The print function in Python by default ends the output with a newline.

print("Hello, World!")
print("How are you?")


Hello, World!
How are you?

As you can see, each print statement puts the output on a new line.

The end Parameter

Python’s print function comes with a parameter named end, which specifies what string is printed at the end. The default value is \n, which represents a newline character.

To print without a newline, you can set the end parameter to an empty string.

print("Hello, World!", end="")
print("How are you?", end="")


Hello, World!How are you?

Using stdout.write

If you want more control over your output, you can use sys.stdout.write().

import sys

sys.stdout.write("Hello, World!")
sys.stdout.write("How are you?")


Hello, World!How are you?

This allows you to write directly to the standard output stream. Note that unlike print, sys.stdout.write() does not automatically append a newline.

String Concatenation

In some cases, you might want to build your output string entirely before printing it. You can accomplish this with string concatenation.

output = "Hello, World!" + "How are you?"


Hello, World!How are you?

Using a Comma Separator with print

You can also use a comma to separate different items to print and specify the end parameter.

print("Hello, World!", "How are you?", sep="", end="")


Hello, World!How are you?

The sep parameter specifies how to separate multiple arguments to print. Setting it to an empty string will place the arguments directly adjacent to each other.

Building Progress Bars

Avoiding a newline is particularly useful when you want to show a progress bar or other types of dynamic output.

Here’s a simple example:

import time

for i in range(10):
    print(".", end="", flush=True)

This will print a dot every half-second, creating a simple loading effect. The flush=True parameter ensures that the output is flushed immediately, updating the output screen instantly.

Implications and Considerations

  1. Buffering: Some systems might buffer the output, which means that you won’t see the output immediately. The flush=True parameter can be used to handle this.
  2. Portability: Methods like sys.stdout.write() may not be portable across all environments, unlike the print function.
  3. Performance: If you’re printing large amounts of data without a newline, using sys.stdout.write() might offer performance benefits over print, although this is often negligible for most applications.
  4. Readability: While these techniques are useful, they can make the code less readable if overused. Always consider the readability and maintainability of your code.


Printing output without a newline in Python offers you greater control over how your output is formatted. While the print function provides the end and sep parameters for basic control, using sys.stdout.write() offers a lower-level method for direct output manipulation.

Understanding these techniques and when to use them effectively can make your Python code more versatile and allow for more refined output display. Whether it’s creating a dynamic progress bar or precisely controlling the formatting of output data, knowing how to manipulate the print function can be a valuable skill for any Python programmer.

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