PCEP Control Flow, Loops, Lists and Logic Practice Question

A developer writes a loop to sum numbers from 1 to 10. The code outputs 55, but the expected sum is 55. However, the loop uses a range that includes 0. Which range should be used to achieve the correct sum?

⚠ Common exam trap

Python Institute often tests the exclusive nature of range()'s stop parameter, tricking candidates into thinking range(1,10) includes 10 or that range(0,11) is equivalent to range(1,11) when the sum is unchanged by zero.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

range(1,11)

(range(1,11)) is correct because range(start, stop) generates numbers from start inclusive to stop exclusive. To sum numbers 1 through 10, the range must start at 1 and end at 11 (so 10 is included). The loop that used range(0,11) included 0, but since adding 0 does not change the sum, the output was still 55 — however, the question asks for the range that achieves the correct sum without including unnecessary values.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
range(0,11)
Why it's wrong here
Includes 0, which is unnecessary but still sums to 55; however the question says the loop includes 0 and that's not desired.
✓
range(1,11)
Why this is correct
Correctly generates 1..10
✗
range(0,101)
Why it's wrong here
Generates 0..100, sum 5050
✗
range(1,10)
Why it's wrong here
Generates 1..9, sum 45

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PCEP Control Flow, Loops, Lists and Logic Practice Question

Why each option matters

Option-by-option breakdown

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