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Computer Science IGCSEPDF 87
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7.3.2 Explaining Algorithms
(e.g.)
● The purpose of the algorithm is to add ten user-entered numbers together and
output the total. The processes are initializing three variables, inputting a user
number, adding to two variables, repeating nine more times and outputting the
final Total value.
● An algorithm should be well-designed to be fully interpreted by others. If a user
does not know the purpose of an algorithm, it should use certain instructions to
make its purpose clear. If the algorithm is complex to some extent, you should
look at additional ways to understand it.
● Looking for comments.
● Considering the context.
● Testing the algorithm with different inputs.
Count ← 1
Number ← 0
Total ← 0
REPEAT
INPUT Number
Total ← Total + Number
Count ← Count + 1
UNTIL Count > 10
OUTPUT Total