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A programmer has written an algorithm to output a series of numbers - OCR - GCSE Computer Science - Question 2 - 2018 - Paper 1
Question 2
A programmer has written an algorithm to output a series of numbers. The algorithm is shown below: for k = 1 to 3: for p = 1 to 5: print (k + p) nex... show full transcript
Worked Solution & Example Answer:A programmer has written an algorithm to output a series of numbers - OCR - GCSE Computer Science - Question 2 - 2018 - Paper 1
Step 1
Give the first three numbers that will be printed by this algorithm.
Answer
To determine the first three numbers printed by the algorithm, we need to analyze the nested loops:
- When
k = 1, the inner loop will execute 5 times withpvalues ranging from 1 to 5:- When
p = 1: print(1 + 1) → 2 - When
p = 2: print(1 + 2) → 3 - When
p = 3: print(1 + 3) → 4 - When
p = 4: print(1 + 4) → 5 - When
p = 5: print(1 + 5) → 6
- When
The first three outputs will be: 2, 3, and 4.
Step 2
State how many times line 03 will be executed if the algorithm runs through once.
Answer
Line 03 executes for each iteration of the inner loop. Since k ranges from 1 to 3 (3 iterations) and p ranges from 1 to 5 (5 iterations), the total number of executions of line 03 is:
Total Executions = 3 (values of k) * 5 (values of p) = 15.
Step 3
Step 4
Describe what is meant by a variable.
Answer
A variable is a symbolic name associated with a memory location that can hold data. It allows programmers to store and manipulate values during program execution. The value assigned to a variable can change throughout the execution of the program.