Sunday 7 August 2022

Swap two numbers with and without using temporary variable


Swap two numbers without using temporary variable

public class SwappingNumbers {

    public static void main(String[] args) {

        float first = 10.0f, second = 14.5f;

        System.out.println("First number is " + first);
        System.out.println("Second number is " + second);

        first = first - second;
        second = first + second;
        first = second - first;

        System.out.println("--Swapping numbers--");
        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);
    }
}

Now lets try to swap the numbers without using the temp variable


public class SwappingNumbers {

    public static void main(String[] args) {

        float first = 11.20f, second = 12.45f;

        // Value of the first is assigned to temporary
        float temporary = first;

        // Value of the second is assigned to first
        first = second;

        // Value of temporary is assigned to the second now
        second = temporary;

        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);
    }
}

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