SAVEE THE EARTH USING ALGORITHMS

SAVE THE EARTH USING ALGORITHMS

1.- Write the definition of:

·         An algorithm:

IS A SERIE OF INSTRUCTIONS OR ORDERER 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.

·         A program:

IS THE TRANSLATION OF AN ALGORITHM INTO A PROGRAMMING LANGUAGE THAT CAN BE UNDERSTOOD AND PROCESSED BY A 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 THE ACTIONS NEEDED TO DEVELOP THE ALGORITHM.

INFO INPUT OR OUTPUT: USED WHEN INFORMATION IS NEDED OR WHEN WE PRESENT DATA OR RESULTS.

DECISION: USED WHEN WE NEED TO DECIDE BETWEEN TWO OR MORE OPTIONS. IT INDICATES THE PATH TO FOLLOW DEPENDING ON THE CHOSEN OPTIONS.

FLOW LINE: TELLS US THE ORDER OF THE ACTIONS IN THE ALGORITHM.

TYPES OF ALGORITHMS

1.- SEQUENTIAL ALGORITHMS à Definition and example

THE BASIC STRUCTURE USED TO SOLVE A PROBLEM IS THE SEQUENTIAL ALGORITHMS. THE INSTRUCTIONS OF THE ALGORITHM ARE EXECUTED ONE AFTER THE OTHER IN THE SAME ORDER AS THEY APPEAR.

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

HAVE A SERIE OF INSTRUCTIONS THAT ARE EXECUTED DPENDING ON WHETHER OR NOT A CONDITION IS MET.

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

HAVE A SET OF INSTRUCTIONS THAT ARE REPEATED SEVERAL TIMES. THESE INSTRUCTIONS ARE CONTAINED IN LOOPS THAT MARK THE BEGINNING AND END OF THE REPETITION.