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Use a while loop to calculate and display the Fibonacci numbers less than 50

class MainClass {   public static void Main()   {     int oldNumber = 1;     int currentNumber = 1;     int nextNumber;     System.Console.Write(currentNumber + " ");     while (currentNumber < 50)     {       System.Console.Write(currentNumber + " ");       nextNumber = currentNumber + oldNumber;       oldNumber = currentNumber;       currentNumber = nextNumber;     }   } } 1 1 2 3 5 8 13 21 34