How to check the time complexity of an Algorithm?

Asked By diegobro 0 points N/A Posted on - 06/08/2020

Hey experts, Whenever I write an algorithm, I want to know the time complexity of an Algorithm to know its performance.

Please help in checking the time complexity of an Algorithm.

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Answered By Jacquelyn D Holdren 0 points N/A #330400

Hey, An algorithm is a step by step process of representing the logic of a program in simple English.

Time complexity: The amount of time taken by a program or an algorithm to run totally is known as time complexity. Through which one can know about the performance of an algorithm or a program.

There are three cases under time complexity:

Worst case: An algorithm taking a large amount of time for its execution considered the worst case.
Average case: An algorithm taking the average amount of time for its execution is considered as the Average case.
Best case: An algorithm taking the lowest amount of time for its execution is considered the best case.

Asymptotic Notations: They are used to calculate the run time of an Algorithm. There are three types of asymptotic notations, they are:

Big oh notation(O): (worst case) A function f(n) = O(g(n)), there exists a positive integer c and n0, such that |f(n)|<= c|g(n)| for n=> n0.

Omega(Ω) notation: The function f(n) = Ω(g(n)), there exist positive numbers n0 and c, this |f(n)|=>c|g(n)| for n=>n0.

Theta notation(Θ): The function f(n) = Θ(g(n)), if there exists three positive constants as c1,c2 and n0 with the constraint c1|g(n)|<=|f(n)|<= c2|g(n)| it is called lower bound.

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