Totalling & Counting (Cambridge (CIE) O Level Computer Science)
Revision Note
Written by: Robert Hampton
Reviewed by: James Woodhouse
Totalling & Counting
How do you use totalling in a program?
Totalling involves adding up values, often in a loop
A total variable is set to 0 at the beginning of the program and then updated within a loop, such as:
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How do you use counting in a program?
Counting involves keeping track of the number of times a particular event occurs
A count variable is set to 0 and then updated within a loop, such as:
Pseudocode | Python |
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Worked Example
Write an algorithm using pseudocode that:
Inputs 20 numbers
Outputs how many of these numbers are greater than 50
[3]
Answer
Count = 0
FOR x ← 1 TO 20 [1]
INPUT Number
IF Number > 50
THEN
Count ← Count + 1 [1]
NEXT x
PRINT Count [1]
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