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Learning word RECURSION An object is said to recursive if it is partially consists (or defined in terms0 of itself. Recursion is encountered not only in mathematics, but also in daily life. Who hasn’t seen an Advertising picture which contain itself? Recursion is particularly powerful means in mathematical definitions. A few familiar examples are those of natural numbers, tree structures and certain functions. a) Natural numbers i. 1 is a natural number. ii. The successor of a natural number is a natural number b) Tress structures, e.g, O is a tree (called the empty tree). c) The factorial function n! ( for negative integers). i. 0!=1 ii. If n>0, then n! =n . ( n-1)! The power of recursion evidently lies in the contains no explicit repetitions. Recursive possibility of defining an infinite set of algorithms however are primarily object by finite statement .IN the same appropriate when the problem to be solved manner an infinite number of copulations or the function to be computed or data can be described by structured to be finite recursive program, even if this processed is already defined in recursive terms program SOFTWARE APPLICATION SYSTEM User developed Standard Operating Utility programs Translators packages @jafferson Learning word The above structure describe the software breakdown. The information can also be presented using a table as shown below SOFTWA System software Translators RE Utility programs Operating system Application software User developed Standard pac

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