Debugging: Bug Hunting! 🐛🔍
Become a code detective! Find and fix the sneaky bugs hiding in your programs.
🤔 What is Debugging?
Debugging is like being a detective! When your code doesn't work right, there's a "bug" hiding somewhere. Your job is to find it and fix it!
Bug + Detective Work = Fixed Code!
📖 Why "Bug"? A True Story!
A long time ago (1947!), a computer stopped working. Scientists found a real moth stuck inside the machine! They called it a "bug" and the word stuck!
"We found the first actual case of a bug being found!"
- Grace Hopper, Computer Scientist, 1947
🐞 Types of Bugs
Different bugs cause different problems!
Spelling Mistakes
Like writing "pirnt" instead of "print"
pirnt("Hello") Computer: "I don't know 'pirnt'!"
Wrong Numbers
Using the wrong value somewhere
age = 1000 Oops! Nobody is 1000 years old!
Infinite Loops
A loop that never stops!
while true: run! Goes forever... and ever... 😵
Missing Parts
Forgetting brackets, quotes, etc.
print("Hello Where's the closing "?
🔍 How to Find Bugs
Here are some detective tricks to find those sneaky bugs!
Read the Error Message
Error messages are like hints! They tell you what went wrong and where.
Error on line 5: "name" is not defined
👆 Look at line 5!
Use Print Statements
Add "print" to see what's happening inside your code!
print("I am here!")
print("The score is: " + score)
Check Your Spelling
One wrong letter can break everything!
mesage
message
Take a Break!
Sometimes the best thing is to walk away and come back with fresh eyes!
🎮 Bug Hunt: Can You Find It?
Look at these code examples. Can you spot the bug?
Bug #1:
pritn("Hello World") Click to see the answer!
"pritn" should be "print"! 🐛
Bug #2:
let age = "ten"
if (age > 5) ... Click to see the answer!
"ten" is text, not a number! Should be: age = 10 🐛
Bug #3:
print("Hello World) Click to see the answer!
Missing the closing quote! Should be: "Hello World" 🐛
💪 The Debugging Mindset
Every programmer makes mistakes - even the best ones! Here's how to think about bugs:
Don't Think:
"I'm bad at coding"
Think:
"I'm learning something new!"
Don't Think:
"This is impossible"
Think:
"Time to be a detective!"
⭐ Pro Debugging Tips!
Rubber Duck Debugging
Explain your code to a rubber duck (or stuffed animal). Often, just explaining it helps you find the bug!
Test Small Pieces
Don't write 100 lines then test. Write a little, test, write more, test again!
Save Working Code
Before making big changes, save a copy of your working code. Just in case!
⭐ Remember This!
- 1
Bugs are mistakes in code - everyone makes them!
- 2
Error messages are your friends - they give hints!
- 3
Use print statements to see what's happening
- 4
Be patient and curious - you'll find it!
Congratulations!
You've learned all the basics of coding! You now know about variables, loops, functions, conditionals, arrays, and debugging!
Keep practicing and never stop exploring! 🚀