Python - For Loop
How can you use
range() to iterate backwards from 10 down to 1 inclusive?How can you use range() to iterate backwards from 10 down to 1 inclusive?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand backward iteration with negative step
Start at 10, stop at 0 (excluded), step -1 counts down.Step 2: Check options
for i in range(10, 0, -1): 10 to 1 inclusive (correct)
for i in range(10, 1, -1): stops at 1 excluded, so 10 to 2
for i in range(1, 11, -1): invalid because start < stop with negative step
for i in range(10, -1, -1): includes 0, goes down to 0Final Answer:
for i in range(10, 0, -1): -> Option AQuick Check:
Stop is excluded, so use 0 to include 1 [OK]
Quick Trick: Stop is excluded, so use stop one less than last number [OK]
Common Mistakes:
MISTAKES- Including stop value
- Wrong start/stop order
- Using positive step for backward loop
Master "For Loop" in Python
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