One effective method often used by programmers to comprehend the effect of code

Question

One effective method often used by programmers to comprehend the effect of code is "tracing". Tracing is hand-executing the code in the same sequence and manner that the computer would execute the program. Often, the changes made to variables in the code are recorded in a "trace table". Each row in the trace table records the values of the variables after a corresponding statement in the left hand column of the trace table has been hand-executed. For example, for the code holden 2 ford13 mitsubishi = 5 a completed trace table would be: holden ford mitsubishi holden = 2 ford 13 mitsubishi = 5 13 2 13 Your task is to trace execution of the following Python code and keep track of variables index and minimum: results= [7, 3, 7] pass-grade = 4 minimum = 7 index = 0 if results[index] >= pass-grade and results [index] minimum : minimum results [index] index = index + 1 if results (index] pass grade and results[index) minimum minimum = results [index index = index + if results(index] > pass-grade and results [index)

Explanation / Answer

Answer)

Answer)

results = [7,3,7]

pass_grade = 4

minimum = 7

index = 0

if results[0] >= 4 and

results[0] < 7:

minimum = results[0] // minimum doesn't change as 7 is not less than 7.

Thus minimum = 7.

index = 0 + 1 = 1; minimum = 7;

if results[1] >= 4 and

results[1] < 7:

minimum = results[1] // minimum doesn't change as 3 is not >= 4

minimum = 7.

index = 1.

index=1+1=2.

minimum = 7.

if results[2] >= 4 and

results[2] < 7:

minimum = results[2] // minimum doesn't change as 7 is not less than 7.

Thus minimum = 7.

index=2.

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