Python print() Function

The print() function is one of the most commonly used built-in functions in Python. It displays the given message or values on the screen (standard output).

Syntax

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)

Parameters:

• *objects – One or more expressions to be printed.
• sep – String inserted between values. Default is a space.
• end – String added after the last value. Default is newline '\n'.
• file – Where to print. Default is the console (standard output).
• flush – Whether to forcibly flush the stream. Default is False.

Basic Example

print("Hello, World!")

Hello, World!

Example: Printing Multiple Values

print("Name:", "Alice", "Age:", 25)

Name: Alice Age: 25

Example: Using sep and end

print("apple", "banana", "cherry", sep=", ", end=".")

apple, banana, cherry.

Use Case: Printing in Loops

for i in range(3):
    print("Line", i)

Line 0
Line 1
Line 2

Print with Formatting

name = "Alice"
age = 25
print(f"My name is {name} and I am {age} years old.")

My name is Alice and I am 25 years old.

Print to a File

with open("output.txt", "w") as f:
    print("Writing to file", file=f)

Common Mistakes

• Using print without parentheses in Python 3 (works in Python 2 only)
• Expecting print() to return a value – it returns None

Interview Tip

print() is often used for debugging. Knowing how to format outputs and print in loops can help during problem solving rounds.

Summary

• print() sends output to the screen.
• You can customize output using sep, end, and file.
• Supports f-strings and multiple arguments.

Practice Problem

Write a Python program that asks for your name and prints: Hello, <your name>!

name = input("Enter your name: ")
print("Hello,", name + "!")