What does n represent when analyzing algorithms?

"N" is considered as the size of the input that is being given in the algorithm.

Explanation: During a problem solving process , a algorithm is used to analyze the problem . Many function and  steps are to be taken care of while analyzing algorithm. Among analyzing step, input is also given which is usually zero more than that . An input has a certain size which is given by the initial "N".  The input size defines the length of the string for the input.

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