Trace the code
What is printed when this code runs?
python
x = 5
x = x + 2
print(x)
7, The variable x starts at 5, then 2 is added, making the new value 7
How many times does this loop run?
python
for i in range(3):
print("Hi")
3 times,
Explanation: range(3) produces 0, 1, and 2, so the loop runs three times
What prints if x = 4?
python
if x > 5:
print(“Big”)
else:
print(“Small”)
Small
Explanation: The condition is false, so the else block runs.
Why doesn’t this code print anything?
python
x = 2
if x > 5:
print(“Yes”)
The condition is false. Explanation: Since x is not greater than 5, the code inside the if statement does not run
What is a loop?
A structure that repeats code.
What is the output of this code?
python
x = 10
y = x - 3
x = y + 4
print(x)
11, y becomes 7, then x is reassigned to 11
What is printed?
python
total = 0
for i in range(1, 4):
total = total + i
print(total)
6
Explanation: The loop adds 1, 2, and 3 to total
What prints if age = 16?
python
if age >= 18:
print(“Adult”)
else:
print(“Minor”)
Minor
Explanation: Since 16 is less than 18, the condition is false.
What is the error in this code?
python
for i in range(4)
print(i)
Missing a colon.
Explanation: Loops require a colon to show where the code block starts.
What does an if statement do?
Checks a condition and runs code if its true.
What does this code print?
python
x = 2
y = x * 3
x = y - x
print(x)
4, y is 6, then x becomes 6-2
What is the final value of count?
python
count = 0
for i in range (5):
count += 1
5
Explanation: The loop runs five times, adding 1 to count each time.
What prints if num = 0?
python
if num > 0:
print(“Positive”)
elif num == 0:
print(“Zero”)
else:
print(“Negative”)
Zero
Explanation: The first condition fails, but the equality check succeeds.
What needs to be added to fix this loop?
python
x = 0
while x < 3:
print(x)
Increase x inside the loop.
Explanation: Without changing x, the condition stays true forever.
What is debugging?
Finding and fixing errors in code.