What is type assertion used for in Go?
- To declare a new type based on an existing type.
- To define custom behavior for operators in Go.
- To handle errors in Go programs.
- To test and extract the underlying concrete value of an interface.
Type assertion in Go is primarily used to test whether an interface value holds a specific type and to extract the underlying concrete value of that type if it does. This allows Go programmers to work with the concrete type safely within the scope of the assertion.
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