Jim says that the output of the floor function is the number before the decimal point in the input. For what domain is jim’s statement correct? Justify your answer.

Jim’s statement is correct for all numbers greater than or equal to 0, and negative integers. It does not work for negative non-integer numbers. For example, the floor of –3.5 is –4, where –4 is not equal to –3, the number before the decimal point.

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