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functional-programmingmiranda

Miranda while- and for-loops

I'm looking for a way to do while-loops or for-loops in Miranda.

I'm trying to do something like

while(blablanotfinished)
{
if(a=true)blabla
else blabla
}
Solution

  • Miranda doesn't have while- or for-loops (which wouldn't make much sense without mutable state anyway). In most cases you can use higher order functions instead. In cases where there is no higher-order function which does what you need, you can use recursion.

    For example if you have the following while-loop in an imperative language:

    f(start) {
    x = start
    while( !finished(x) ) {
        x = next(x)  
    }
    return x
}

    You would express it recursively in Miranda like this:

    f x = if finished x then x else f (next x)