Swapping of two numbers in Ruby

class SwapExample
    def swapNumbers
        a = 3
        b = 6

        puts("The value of a before swap is " + a.to_s)
        puts("The value of b before swap is " + b.to_s)

        # Swapping of two numbers using temp variable
        temp = a
        a = b
        b = temp

        puts("The value of a after swap is " + a.to_s)
        puts("The value of b after swap is " + b.to_s)
    end
end

obj = SwapExample.new
obj.swapNumbers

class SwapExample
    def swapNumbers
        a = 3
        b = 6

        puts("The value of a before swap is " + a.to_s)
        puts("The value of b before swap is " + b.to_s)

        # Swapping of two numbers using arithmetic operations
        a = a + b
        b = a - b
        a = a - b

        puts("The value of a after swap is " + a.to_s)
        puts("The value of b after swap is " + b.to_s)
    end
end

obj = SwapExample.new
obj.swapNumbers

class SwapExample
    def swapNumbers
        a = 3
        b = 6

        puts("The value of a before swap is " + a.to_s)
        puts("The value of b before swap is " + b.to_s)

        # Swapping of two numbers using arithmetic operations
        b = a + b - (a = b)

        puts("The value of a after swap is " + a.to_s)
        puts("The value of b after swap is " + b.to_s)
    end
end

obj = SwapExample.new
obj.swapNumbers

class SwapExample
	def swapNumbers
		a = 3
		b = 6

		puts("The value of a before swap is " + a.to_s)
		puts("The value of b before swap is " + b.to_s)

		# Swapping of two numbers
		# using exclusive OR operation (i.e. XOR)
		a = a ^ b
		b = a ^ b
		a = a ^ b

		puts("The value of a after swap is " + a.to_s)
		puts("The value of b after swap is " + b.to_s)

	end
end

obj = SwapExample.new
obj.swapNumbers