Which of the following for loops will run the loop body 5 times?

Question

BlackTom AI · Accepted Answer

Question restatement: Which of the following for loops will run the loop body 5 times?

Option A: for i in range(5, 1, -1) :
This range starts at 5 and decrements by 1 each step, stopping before reaching 1. The sequence produced would be [5, 4, 3, 2], which contains 4 values. Therefore, this loop body would execute 4 times, not 5.

Option B: for i in range(5, 0, -1) :
Here, the range starts at 5 and goes down to but not including 0, stepping by -1. The produced sequence is [5, 4, 3, 2, 1], giving 5 iterations in total. This matches the required count of 5 executions.

Option C: for i in range(6, 0, -1) :
This range begins at 6 and descends by 1 until it reaches but does not include 0. The resulting sequence is [6, 5, 4, 3, 2, 1], which yields 6 iterations, more than the target of 5.

Option D: for i in range(4, 0, -1) :
Starting at 4 and stepping down by 1 while not including 0 produces [4, 3, 2, 1], which is 4 iterations, again not equal to 5.

Decision process: To count iterations from a Python range, you can consider how many values are produced before the stop value is reached (exclusive). A start value of 5 with a stop of 0 and a negative step of -1 yields exactly five values, matching the requirement. Other start/stop combinations shown produce four or six values instead, due to the inclusive/exclusive behavior of range endpoints and the direction of the step.

Summary check: The key to getting 5 iterations is a start at 5, a stop at 0, and a negative step of -1, which corresponds to the second option. The remaining options deviate in start or stop values and consequently generate a different number of iterations.

Fal25_CS003C_74229 Ch. 4 Pre-Quiz (Remotely Proctored)

Which of the following for loops will run the loop body 5 times?

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