Edexcel GCSE Computer Science 2020

2.1.4: be able to add together two positive binary patterns and apply logical and arithmetic binary shifts

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KeywordDefinition
arithmetic shift leftexactly the same as a logical shift left but may result in a value flipping between positive and negative if an overflow occurs
arithmetic shift rightcopying the most significant bit on to the left of a binary value and discarding the bits on the right. Divides a signed or unsigned number by 2
binary additionadding two binary values together
carryan extra 0 or 1 which needs to be used when the result of a binary addition is more than 1
logical shift leftadding zeros on to the right of a binary value and discarding the bits on the left. Multiples the value by 2
logical shift rightadding zeros on to the left of a binary value and discarding the bits on the right. Divides the value by 2
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