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## Compare two revisions of: Explanations

 ... ... @@ -46,3 +46,4 @@ The optional condition is an expression that can be evaluated to true of false. 46 46 | edited(arg) | Evaluates to true if the referenced answer was edited. _arg_ is an answer reference | edited(ans), edited(ans_4)

[example in WebMiau](https://miau.mumie.net/web-miau/editor/content%2Fexamples%2Fexplanations%2Fprb_differentiated_feedback_1.src.tex) | 47 47 | condition(arg) | Substitutes this command with arg. That is helpful if one wants to reuse the same condition multiple times. _arg_ is a string variable. It's value is a valid condition expression. | declared variable: \string{mycondition}{NOT [edited(ans)] OR count(/,ans)=0 }, reusing it: condition{mycondition} OR equalString(42,ans)

[example in WebMiau](https://miau.mumie.net/web-miau/editor/content%2Fexamples%2Fexplanations%2Fprb_differentiated_feedback_1.src.tex) | 48 48 | answerEqual(arg) | At the moment that only works for type input.interval. It compares the current answer with the given expression _arg_. The expression may contain variables. Be aware that you have to escape brackets. | NOT [edited] OR answerEqual($a;3$), answerEqual($-infinity;3$,$$4;5$$)

[example in WebMiau](https://miau.mumie.net/web-miau/editor/content%2Fexamples%2Fexplanations%2Fprb_differentiated_feedback_3.src.tex)| 49 +| answerExactMatch(arg) | Analog to answerEqual, but the user answer has to be exactly the same. E.g. (3;3) and (4;4) are both emty sets and therefore *equal* but they are not an *exact Match*. At the moment that only works for type input.interval. | NOT [edited] OR answerExactMatch($a;3$), answerExactMatch($-infinity;3$,$$4;5$$)

[example in WebMiau](https://miau.mumie.net/web-miau/editor/content%2Fexamples%2Fexplanations%2Fprb_differentiated_feedback_3.src.tex)| 49 50