Question

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
}

Answer 1

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)