DESIGN TOOLS Programming FOR ASO 1 WE WILL

DESIGN TOOLS Programming

FOR ASO 1 WE WILL LOOK AT: Pseudocode

PSEUDOCODE Designing a Program

WHAT IS AN ALGORITHM? It’s a procedure for solving problems. It shows actions to be executed by a sequence of steps taken to solve a problem. Pseudocode is an informal language that helps programmers to develop algorithms. It’s mainly written in plain English, but still has a style guide of how to format and write the pseudocode.

RULES FOR WRITING PSEUDOCODE: Pseudocode has some basic standards to make it easier for everyone to read and follow what your algorithm is all about. *Note sometimes the rules can vary slightly

INDENTATION IS VERY IMPORTANT!!!!

USE IMPORTANT KEY WORDS Set Get Print/Display Call (For Use of Modules) Return Store Add/Subtract Increment Repeat

STARTING A PROCEDURE BEGIN Procedure (Your book says Start not Begin) … … … END Procedure (Your book says Stop not End)

IF BEGIN Procedure IF Condition … … END IF END Procedure

EXAMPLE: BEGIN Print. Word Get Number IF Number == 1 Print One END IF END Print. Word See INDENTATION!

IF/ELSE BEGIN Procedure IF Condition … … ELSE … … END IF END Procedure

EXAMPLE: BEGIN Print. Word Get Number IF Number == 1 Print One ELSE Print Hello END IF END Print. Word

WHILE BEGIN Procedure WHILE Condition … … END WHILE END Procedure

EXAMPLE: BEGIN Tally Set Count to 1 WHILE Count <=30 Total(Item(Count))=Total(Item(Count))+1 Add 1 to Count END WHILE Print Total END Tally

FOR BEGIN Procedure FOR Condition … … END FOR END Procedure

BEGIN Print. Letter Get Word FOR letter in Word Print current letter END FOR END Print. Letter