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Introduction
I have used Swift for windows 1.9 for debugging purpose. But you can use any Swift programming language compiler as per your availability.
func maxnumber(_ num1: Int, _ num2: Int, _ num3: Int) -> Int { if num1 > num2, num1 > num3 { return num1 } else if num2 > num3, num2 > num1 { return num2 } else if num3 > num2, num3 > num1 { return num3 } else if num1 == num2, num2 > num3 { return num1 } else if num2 == num3, num3 > num1 { return num2 } else { return num1 } } print(maxnumber(-4, -5, 0)) print(maxnumber(11, 12, 13)) print(maxnumber(30, 20, 10))