Dynamic languages, such as JavaScript, tend to encounter errors at runtime when incorrect data types are used. This is because the language attempts to provide a result for any expression, even if it is not meaningful. In contrast, static languages offer a higher degree of protection against these types of errors, as the type system prevents many of them from occurring.
The difference between static and dynamic languages lies in their understanding of what constitutes valid program code. In dynamic languages, expressions like "a" - 1 are considered valid and will be executed, but will result in an error during runtime. Conversely, in most static languages, expressions like this are considered invalid and will not even be compiled. The concept of validity and invalidity does not exist in the same way in dynamic languages.
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