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explain what the big-o notation means in computer science.
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in computer science, big-o notation is used to describe the performance of an algorithm— specifically the worst case number of operations required to execute the algorithm. big-o notation assigns a letter "o" to a function that describes the growth rate of its execution time. the number of operations is then classified according to how quickly it grows in terms of the input size. big-o notation is often used to compare different algorithms to see which one is faster.
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