Question: EX 7.5 Overload the multiconcat method from Exercise 7.4 such that if the integer parameter is not provided, the method returns the string concatenated

EX 7.5 Overload the multiconcat method from Exercise 7.4 such that if

EX 7.5 Overload the multiconcat method from Exercise 7.4 such that if the integer parameter is not provided, the method returns the string concatenated with itself. For example, if the parameter is "test", the return value is "testtest".

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