Unit 11.1A · Term 1

Output & Escape Sequences

Every program needs to communicate with the user. In Python, the print() function is your primary tool for displaying information. This lesson covers how to organize data output and use special escape sequences to control formatting.

Learning Objectives

11.1.1.1 Organize data output
11.1.1.2 Use the escape sequences with data output

Lesson Presentation

11.1A-lesson-01-output.pdf · Slides for classroom use

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Video Explanation

Watch a visual walkthrough of this topic

Conceptual Anchor

The Billboard Analogy

Think of print() as a digital billboard. You choose what to display (the message), how items are separated (the sep parameter), and what comes at the end (the end parameter). Escape sequences are like formatting controls — they tell the billboard to start a new line, insert a tab space, or display special characters like quotes.

Rules & Theory

The print() Function

# Basic syntax
print(value1, value2, ..., sep=' ', end='\n')

# Simple output
print("Hello, World!")          # Hello, World!

# Multiple values — separated by space by default
print("Name:", "Ali")           # Name: Ali
print("Age:", 16)               # Age: 16

# Changing the separator
print("2025", "02", "19", sep="-")    # 2025-02-19
print("A", "B", "C", sep=" → ")       # A → B → C

# Changing the end character
print("Loading", end="...")     # Loading...
print("Done!")                  # Done!  (on same line)

# Empty print = blank line
print()                         # (blank line)

Escape Sequences

Escape Sequence	Meaning	Example Output
`\n`	New line	Line 1↵Line 2
`\t`	Tab (8 spaces)	Name Score
`\\`	Backslash character	C:\Users\
`\'`	Single quote	It's
`\"`	Double quote	He said "Hi"

# Escape sequences in action
print("Line 1\nLine 2\nLine 3")
# Line 1
# Line 2
# Line 3

print("Name\tScore\tGrade")
print("Ali\t95\tA")
print("Dana\t87\tB")
# Name    Score   Grade
# Ali     95      A
# Dana    87      B

print("Path: C:\\Users\\student\\file.py")
# Path: C:\Users\student\file.py

print('He said: "Hello!"')       # He said: "Hello!"
print("It\'s a sunny day")       # It's a sunny day

Organizing Output

Use \t to create aligned columns. Use \n to break long messages across lines. Combine sep and end with loops for formatted tables.

Worked Examples

1 Formatting a Student Report

# Organized output using sep and escape sequences
name = "Aisha"
grade = 11
score = 92.5

print("=" * 30)
print("STUDENT REPORT")
print("=" * 30)
print("Name:", name)
print("Grade:", grade)
print("Score:", score)
print("=" * 30)

# Output:
# ==============================
# STUDENT REPORT
# ==============================
# Name: Aisha
# Grade: 11
# Score: 92.5
# ==============================

2 Building a Table with Tabs

# Using \t to create aligned columns
print("Product\tPrice\tQty")
print("-" * 30)
print("Apple\t$1.20\t50")
print("Banana\t$0.80\t120")
print("Orange\t$1.50\t75")

# Output:
# Product   Price   Qty
# ------------------------------
# Apple     $1.20   50
# Banana    $0.80   120
# Orange    $1.50   75

3 Printing on the Same Line

# Using end parameter to stay on the same line
print("Counting: ", end="")
for i in range(1, 6):
    print(i, end=" ")
print()  # Move to next line

# Output:
# Counting: 1 2 3 4 5

4 Multi-line Art with Escape Sequences

# Combining \n for multi-line output
print("  *\n ***\n*****\n ***\n  *")

# Output:
#   *
#  ***
# *****
#  ***
#   *

Pitfalls & Common Errors

Forgetting Escape in File Paths

Writing print("C:\new\test") will interpret \n as a newline and \t as a tab! Use \\ or a raw string r"C:\new\test".

Mixing Quote Types

print('It's raining') causes a SyntaxError because the apostrophe ends the string early. Fix: print("It's raining") or print('It\'s raining').

Missing Separator between Arguments

print("Score:" 95) is wrong — you need a comma between arguments: print("Score:", 95).

Pro-Tips for Exams

Output Questions

When tracing print() with sep and end, write out the exact output character by character
Remember: default sep=' ' (space) and default end='\n' (newline)
print() with no arguments just prints a blank line
Count the \t stops carefully — they align to 8-character boundaries

Graded Tasks

Remember

List all 5 escape sequences from this lesson and give one example for each.

Understand

Explain the difference between print("A", "B") and print("A", "B", sep=""). What does each output?

Apply

Write a program that prints a multiplication table for 5 (from 5×1 to 5×10) using \t for alignment.

Apply

Print the following path correctly: C:\Users\student\Documents\homework.py

Create

Create a formatted "receipt" using print() with \t, \n, sep, and end. Include at least 3 items with prices and a total.

Self-Check Quiz

1. What is the default value of the sep parameter in print()?

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2. What does \t do in a string?

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3. What is the output of print("A", "B", "C", sep="-", end="!")?

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4. How do you print a backslash character?

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5. What happens if you write print("Hello\nWorld")?

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