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π is an important number. it is used to do calculations about circles and spheres, as well as to measure angles using radians. π has some interesting properties, such as being

strings are sequences of characters. for example, 'hello!' is a string because it is made up of the characters 'h', 'e', 'l', 'l', 'o', and '!'. in java, strings are objects, which

millions of civil engineers worldwide use autocad to help create visual representations of important projects. buildings, bridges, and cityscapes come alive in autocad and allow