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A programmer declares the following variables - OCR - GCSE Computer Science - Question 4 - 2021 - Paper 1
Question 4
A programmer declares the following variables. first = "Computer Science" second = "is great" (a) State one difference between a variable and a constant. (b) Stat... show full transcript
Worked Solution & Example Answer:A programmer declares the following variables - OCR - GCSE Computer Science - Question 4 - 2021 - Paper 1
Step 1
Step 2
State the output from the following lines of program code.
Answer
The output of the code provided will be as follows:
(i) print(first.length) will output 15, as 'Computer Science' contains 15 characters.
(ii) print(second.length DIV 3) will output 2, since 'is great' has 8 characters and dividing 8 by 3 gives 2 when considering integer division.
(iii) print(3 ^ 2) will output 9, as this is a calculation of 3 raised to the power of 2.
Step 3
Use string manipulation with the variables first and/or second to produce the following output.
Answer
(i) great can be obtained with:
print(second)
(ii) Computer can be obtained with:
print(first.substring(0, 8))
(iii) Science is great can be obtained with:
print(first.substring(9) + " " + second)
This uses substring to extract 'Science' from first and concatenate it with second.