Code Labs: Debugging

Hunt down Syntax and Logic Errors before deploying.

Interactive Engine

Test the debugging skills below. Code with Syntax errors will turn the terminal red.

debug_demo.py

# Run this code to see a Syntax Error crash the terminal!
# A parenthesis is missing at the end of the print statement.

print("Hello World"

Console Output

> Waiting to compile...

The Crucible

Prove your knowledge of removing bugs.

Bronze (Syntax)

The Syntax Crash

Syntax Errors happen when you break the grammatical rules of the programming language. The code will immediately crash and refuse to run.

Task: Find the two syntax errors in the code below and fix them so the programme successfully compiles and prints the message.

bronze.py

# Fix the Syntax Errors!
name = "Ada"

if name == "Ada"
    print("Welcome Creator!"

> Output will appear here...

Silver (Logic)

The Deceptive Math

Logic errors are sneaky. The computer perfectly understands the code, and it runs without crashing! But the outcome or calculation is wrong because the human told it to do the wrong thing.

Task: The code below calculates the area of a triangle. The area of a triangle should be (base * height) / 2. Fix the logic error so it outputs 25.0 instead of 100.0.

silver.py

base = 5
height = 10

# There is a logic error on the line below! Fix it.
area = base * height / 0.5

print("The area is:", area)

> Output will appear here...

Gold (Master Debugger)

Complete Inspection

This function is supposed to check if a number is EVEN. It contains both a Syntax Error, and a Logic Error (Hint: even numbers divide by 2 with 0 remainder).

Task: Fix both errors so the terminal successfully completes its output proving that "10 is even" is True.

gold.py

def is_even(num)
    # Hint to fix logic error: modulo is % 
    # and equivalency check requires ==
    if num % 3 = 0:
        return True
    else:
        return False

# Test the function (this code is fine)
result = is_even(10)
print("Is 10 even?", result)

> Output will appear here...

Return to Theory Guide

Interactive Engine

User Input Required

The Syntax Crash

The Deceptive Math

Complete Inspection