Mostly yes. Numbers (and character) are implemented as arrays with 0 dimensions. Text would be an array of characters with 1 dimension (the number of character

Mostly yes. Numbers (and character) are implemented as arrays with 0 dimensions. Text would be an array of characters with 1 dimension (the number of characters), and generally speaking the dimension of an array is a one dimensional list of non-negative integers. Many array languages also include an array type which is approximately the same as a C pointer to an array, with a bit of jargon thrown in to distinguish a reference to an array from the array itself. Something like an SQL table in an array language would be implemented as a list of columns (rather than as a list of rows) and a corresponding list of column labels. This has some interesting benefits. That said, functions in array language are typically not arrays (though they presumably would have a textual representation). So... not everything is an array.