TalentJR

Lesson 16

Error Handling

Handle errors gracefully

1Try-Except Blocks✨

💻 code
try:
    age = int(input("Age: "))
    print(f"You're {age} years old")
except ValueError:
    print("Please enter a number!")

2Multiple Exceptions🎯

💻 code
try:
    numbers = [1, 2, 3]
    print(numbers[10])
except IndexError:
    print("That index doesn't exist!")
except Exception:
    print("Something went wrong!")

3Finally Block💡

💻 code
try:
    file = open("data.txt")
    data = file.read()
finally:
    file.close()  # Always runs

4Common Errors🚀

  • ValueError - wrong type conversion
  • IndexError - list index out of range
  • KeyError - dictionary key not found
  • NameError - variable not defined
  • ZeroDivisionError - dividing by zero

5Preventing Errors🔍

💻 code
def safe_divide(a, b):
    if b == 0:
        return None
    return a / b
💻 code
# Validate input
while True:
    try:
        age = int(input("Age: "))
        if age < 0:
            print("Age can't be negative!")
            continue
        break
    except ValueError:
        print("Please enter a number!")

🎯 Practice Challenges

Master Error Handling by completing all 3 difficulty levels

🟢 EASY

Error Handling - Easy Challenge

Start with the basics. Perfect for beginners!

🟡 MEDIUM

Error Handling - Medium Challenge

Get more challenging. Build your confidence!

🔴 HARD

Error Handling - Hard Challenge

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