Algorithm (Basic Algorithm Presentation).pptx

Computational Thinking  Computational thinking means thinking or solving problems like a computer scientist.  There are four key techniques to computational thinking:  Decomposition  Pattern Recognition  Abstraction  Algorithm

Computational Thinking  Pattern recognition:  Looking for similarities among and within problems.  Abstraction:  Focusing on the important information only, ignoring irrelevant detail.

Decomposition  The process of breaking down a complex problem into smaller, simple and easy to manage parts.  We do many tasks on a daily without even thinking about or decomposing them, such as getting ready to school, finishing school work  Breaking the problem down into smaller parts means that each smaller problem can be examined in more detail.

What is Algorithm?  An algorithm is a process or set of rules to be followed in calculations or other problem-solving operations, especially by a computer.  It is a set of rules to obtain the expected output from the given input.   An algorithm is simply a set of steps used to complete a specific task

Algorithm Around Us  Algorithms are everywhere around us.  We humans follow and perform daily tasks in the form of algorithms without knowing that they are algorithms.  One of the most obvious examples of an algorithm is a recipe. It’s a finite list of instructions used to perform a task.  Example: making tea, cross the road

Algorithm in Computer Science  Algorithm are one of the four cornerstones of computational thinking.  Algorithmic programming is all about writing a set of rules with a finite number of steps that instruct the computer how to perform a task.  A computer program is essentially an algorithm that tells the computer what specific steps to execute, in what specific order, in order to carry out a specific task.

Algorithm in Computer Science  An algorithm are written using a particular syntax, depending on the programming language being used.

Algorithm in Computer Science  Find the product of two numbers.  Find the number 1.  Find the number 2.  What is operator?  Where to store the result?

Algorithm in Computer Science  Find the product of two numbers.  Enter number 1  Store number 1 in x  Enter number 2  Store number 2 in y  Multiple x & y  Store result in z (z=x*y)  Display number Note: now these instructions can be easily translated into computer program

What is Computer Program?  In computer program, a sequence of instructions is given to computer to solve a specific problem.  Computer programs consist of a series of instructions to tell a computer exactly what to do and how to do it.  Programing:  Programing is writing computer code to create a program, in order to solve a problem.  Code:  Code is the process of translating an algorithm into a programming language.

Algorithm in Computer Science  Solve: 8+9*7+2(9-3)  Write a computer program that ensures that everyone who is under 15 years of age will get discount.

Algorithm  Algorithm:  Find out how old the person is  If the person is younger than 15 then say “You are eligible for a discount ticket”  Otherwise, say “you are not eligible for a discount ticket”

Program  Program in syntax based language: age = int(input(“How old are you”)) If age < 15: print(“You are eligible for discount”) else: print(“you are not eligible for discount”)

Write a program that can find the sum of three numbers and print the results

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Algorithm (Basic Algorithm Presentation).pptx

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Algorithm (Basic Algorithm Presentation).pptx