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What is an algorithm really?

  • An algorithm is essentially any process that leads to a solution, such as making coffee or solving a math problem.
  • In computer science, an algorithm is a sequence of instructions that tells a computer how to solve a problem.
  • The term 'algorithm' originated from the name of a 9th-century Persian mathematician, Al-Khwarizmi.
  • Algorithms are crucial in computer science due to the need to provide machines with explicit step-by-step instructions.
  • Algorithms exist in various forms, like greedy algorithms, divide and conquer, dynamic programming, and backtracking.
  • Algorithms must have a clear endpoint to avoid infinite loops and ensure efficient operation.
  • Some algorithms provide approximate solutions due to complexities, time constraints, and the nature of certain problems.
  • Designing algorithms involves deeply understanding the problem, defining inputs and outputs, handling constraints and edge cases, choosing the right technique, developing the algorithm step-by-step, and testing and optimizing it.
  • Algorithms are omnipresent in both computer science and daily life, guiding processes and decision-making.
  • The human brain's algorithms showcase incredible real-time decision-making capabilities that surpass even the fastest computer programs.

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