Binary to decimal conversion in ruby

Convert binary number into decimal number

Ruby program for Binary to decimal conversion. Here mentioned other language solution.

#  Ruby program for
#  Convert binary to decimal number
class DecimalNumber 
	def binaryTodecimal(number) 
		#  Assuming that number contains 0,1s
		#  Used to store result
		result = 0
		bit = 0
		n = number.length - 1
		#  Display Binary number
		print("Binary :  ", number)
		#  Execute given number in reverse order
		while (n >= 0) 
			if (number[n] == '1') 
				#  When get binary 1
				result += (1 << (bit))
			end
			n = n - 1
			#  Count number of bits
			bit += 1
		end
		#  Display decimal result
		print("  Decimal :  ", result, "\n")
	end

end

def main() 
	task = DecimalNumber.new()
	#  Test Cases
	task.binaryTodecimal("1111")
	task.binaryTodecimal("10111")
	task.binaryTodecimal("10101")
	task.binaryTodecimal("1001")
	task.binaryTodecimal("1101")
end

main()

Output

Binary :  1111  Decimal :  15
Binary :  10111  Decimal :  23
Binary :  10101  Decimal :  21
Binary :  1001  Decimal :  9
Binary :  1101  Decimal :  13


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