What does N represent when analyzing algorithms?

Answer: "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.