save the earth using algorithms

SAVE THE EARTH USING ALGORITHMS

         

1.- Write the definition of:

• An algorithm: is a series of instructions or ordened steps for performing an activity or resolving a problem

• The project approach: is a method of dealing with and resolving the practical problems affecting any society. It consists of ten stages and we study it as an algorithm

• A program: is the translation of an algorithm into a programming language that can be understood by any computer

2.- The chart used to represent algorithms is called …flowchart…………….. or …flow diagram………….. and uses symbols connected by …arrows………. to show the sequences of the actions.

3.- Write the name of the symbols used in flowcharts, what they are used to and insert one image of each one and all together in an example:

terminal : represents the beginning or end of the development of an algorithm

process: used to represent each of actions needed to develop the algorithm

information input or output: used when informacion is needed (additionaldata to develop the algorithm) or when we present data or results

decision : used when need to decide between two or more options. It indicates the path to follow depending on the chosen option

flow line : tells us the order of the actions in the algorithm

TYPES OF ALGORITHMS

1.- SEQUENTIAL ALGORITHMS  Definition and example

the basic structure used to solve a problem is the sequetial structure . Here the intructions of the algorthm are executed one after the other in the same order as they appear

2.- SELECTIVE (OR CONDITIONAL) ALGORITHMS  Definition and example

have a series of intructions that are executed depending or whether or not a condition is met

3.- ITERATIVE (OR REPEATING) ALGORITHMS  Definition and example

have a set of instructions that are repeated several times .These instructions are contained in loops that mark the beginning and the end of the repetiton