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TDIII - Algorithm tools

jorge.as92

Created on August 31, 2020

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Algorithms: creation and representation

Digital Technologies III

Representing algorithms

Pseudocode

It consists of a series of ordered, numbered commands. They must be clear, and use the correct terms and symbols used in programming.

3 ways... Remember them?

Flowcharts

Programming code

A visual representationof the steps. It uses specific symbols to represent different commands.

Computer instructions written in a programming language.

Start

What information does my algorithm need to solve this problem?
What result or answer does my algorithm need to give?
What do I need to do with that information to get that result or answer?

Creating an algorithm

+ - = * / ^

sum

assignment

multiplication

subtraction

raise topower

division

Operators

for mathematical expressions

> < >= <= !=

grater than or equal

less than

greater than

less than or equal

not equal

START: It orders the computer to start. INPUT: Used for receiving data into a variable. OUTPUT: It is used to display information (the result of the algorithm or a message) END: The last statement; it tells the computer to end the algorithm. IF - ELSE IF : Used for conditional statements (more on that later...)

Pseudocode Keywords

Example: an algorithm that asks for your name and then greets you... 1. START 2. OUTPUT "What's your name?"3. INPUT name 4. OUTPUT "Hello, " , name 5. END

Flowcharts

They represent the in an algorithm.

flow of data

They help us to...

Organize our thoughts and the process
Show an algorithm in a visual way.
Find patterns and insights about the desired outcome

True

False

True or False?

1 > 5.5 -4 -2 < 0.5 * -2 5+2 >= 9-2 2^2 <= 6 4 / 2 > 0^12 10^2 >= 15 25 != 5^3

11 >= 5 -13 <= 10 -5 >= 5 2 <= 6 ^2 10 / 2 <= 0

Flowcharts