looping arrays with a function

How can you pass an array to a function, or loop it in
any way? All arrays, no matter how many dimensions,
are listed as _vartype.

I am trying to make a C function (or any language,
really) that would take a number as one argument, the
array as the other, and look at the array to find an
index number for the array argument based on the first
argument.

Thanks,
Jeff Davis
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