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Translation of the wiki page Getting started with KAlgebra from English (en).

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Translations:Getting started with KAlgebra/25/cs

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'''KAlgebra''' is a calculator with symbolic and analysis features that lets you plot 2D and 3D functions as well as to easily calculate mathematical expressions.‎

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== The Console Tab ==‎

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When you first open '''KAlgebra''' a blank window shows up, this is the main work area for calculus.‎

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Let's get started with a little example of how KAlgebra works, just type: {{Input|1=2+2}} Then type <keycap>Enter</keycap> and '''KAlgebra''' will show you the result. So far it's easy.‎

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However, '''KAlgebra''' is much more powerful than that. It started as a simple calculator, but now it's almost a [http://en.wikipedia.org/wiki/Computer_algebra_system CAS].‎

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You can define variables this way: {{Input|1=k:=3}}‎

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And use them normally: {{Input|1=k*4}}‎

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And that will give you the result: {{Output|1=12}}‎

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You can also define functions: {{Input|1=f:=x->x^2}}‎

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And then use them: {{Input|1=f(3)}}‎

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Which should return {{Output|1=9.}}‎

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You can define a function with as many variables as you want: {{Input|1=g:=(x,y)->x*y}}‎

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The possibilities of defining functions are endless if you combine this with the piecewise function. Let's define the factor function:‎

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{{Input|1=fact:=n->piecewise { n=0 ? 1, n=1 ? 1, ? n*fact(n-1) } }}‎

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Yes! '''KAlgebra''' supports recursive functions. Give some values to n, to test it.‎

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{{Input|1=fact(5) fact(3) }}‎

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KAlgebra has recently started support for symbolic operations, to check it out, just type: {{Input|x+x+x+x}}‎

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or {{Input|1=x*x}}‎

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It doesn't work on some complex structures, though. Only basic support so far.‎

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Moreover, '''KAlgebra''' has support for differentiation. An example of the syntax: {{Input|1=diff(x^2:x)}}‎

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If you have used '''KAlgebra''', you will have noticed the ''syntax completion'' support, which is very helpful.‎

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Another resource that can be useful to learn more about '''KAlgebra''' comes with '''KAlgebra''': The <menuchoice>Dictionary</menuchoice> tab‎

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It contains examples of every function supported by '''KAlgebra'''. Maybe this is the best way to learn how to do things with '''KAlgebra'''.‎

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[[Category:Education]]‎

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