Can you explain what the term 'heterogeneous data type' means?

The term "heterogeneous data type" refers to a structure or collection that can contain elements of different data types.

Unlike homogeneous collections (for example, arrays of a single type), heterogeneous collections allow storing, for example, numbers, strings, objects, etc., together.

An example in Java is using a collection with the type Object:

List<Object> list = new ArrayList<>();
list.add("string");
list.add(123);
list.add(new Date());

Here, the list contains different data types, which makes it heterogeneous.

Heterogeneous types are useful when working with diverse data but require additional processing and type checking during use.