![]() That something is bound to the same variable in two shoulders of theĪlternative then it is possible to do with only If every of two arms of the alternative have oneīy one operators, then it is possible to try to use the function if from the set of the built-inįunctions of Mathcad (please, compare two functions in the fig. 40) instead of the operator if from the programming bar. The second (non-zero) script depending on what current value (0 – no, not zero – Operations according to the first (it is better to say – according to zero) or The program, which directs the alternative. Realize the branched algorithms the structural directive construction, namely alternative The function if instead of the operator if The continuation (opening) of the theme you will find in tip 45 and in one of the books «Programming Hence we see the «uselessness» of the alternative. TheĪlternative is the tool for shortcut motion along the program only on oneĭirection (top-down), but the cycle is the shortcut motion on both directions The complete alternative (the alternative with twoĪrms) is two incomplete alternatives: two alternatives with one arm. The alternative with one arm is the cycle with pre-check, which loop body isĮxecuted either once or never. ![]() The operator if is excluded from the second program in the fig. 39: ![]() The cycle with pre-check, which loopīody has the complete alternative. Realized without the operator if from the panel of programming of Mathcad.įunction, which returns the root of an equation and uses half-division method, is created by the first program in Take into consideration that the alternative is the backup structuralĬontrolling construction, then the algorithm of any difficult program can be
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