🧠 Learn to Trace Code by Hand

Before running code, pause and predict the output. This builds real understanding.

Consider this:

x = 0

for i in range(3):
    x += i

print(x) 

Walk through slowly.

1. Start: x = 0

2. i = 0 → x = 0

3. i = 1 → x = 1

4. i = 2 → x = 3

Final output:

3

This habit strengthens your debugging ability more than passive reading ever will.

Try this daily with small snippets.