Local variables in Java do not have any default value. Unlike instance variables or static variables, they are not automatically initialized by the compiler. If you try to use a local variable without initializing it, the compiler will throw an error.
How is it used?
Before using a local variable, you must explicitly assign it a value within the method or block where it's declared. If not initialized, the code won't compile.
Example:
public class Example { public void display() { int num; // Local variable System.out.println(num); // Compilation error: variable num might not have been initialized } }
4. Conclusion
Local variables must be initialized explicitly by the programmer before use; otherwise, a compile-time error will occur. This ensures that you're always aware of what value you're working with.