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My daughter recently asked me for some help with her A Level computing homework. She'd been given 15 exercises to do each of which involved the creation of an algorithm to perform one specific job. For instance one algorithm required her to draw a rectangle on the screen, that sounds easy when you consider that Windows is a graphical environment so drawing a rectangle should be straightforward, but this was complicated by the stipulation that it should be a console application (DOS type application) which limited her to using characters only.