What feature characterizes dynamically typed languages?

Dynamically typed languages are characterized by their flexibility regarding variable types. In these languages, variables can be assigned values of different data types at runtime, meaning you can reassign a variable from holding an integer to holding a string, for example. This dynamic nature reduces the need for strict type declarations and allows for greater ease of programming and quicker prototyping.

In contrast, languages that require explicit type declarations or perform type checking at compile time enforce stricter rules about what types a variable can hold, which limits the kinds of operations that can be performed on those variables until the program is compiled. Furthermore, the assertion that dynamically typed languages only support primitive types is incorrect. They often support complex data types, including objects and collections, facilitating the building of sophisticated applications.