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https://github.com/TheAlgorithms/Ruby
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24 lines
656 B
Ruby
24 lines
656 B
Ruby
#
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# For any binary number of n digits i.e dn-1 ... d3 d2 d1 d0
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# The equivalent decimal number is equal to the sum of binary digits (dn) times their power of 2 (2n):
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# decimal = d0×2^0 + d1×2^1 + d2×2^2 + ...
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#
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def binary_to_decimal(n)
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decimal = 0
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base = 1
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until n.zero?
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x = n % 10
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n /= 10
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decimal += x * base
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base *= 2
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end
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decimal
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end
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puts 'Decimal value of 110011 is ' + binary_to_decimal(110_011).to_s
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# Decimal value of 110011 is 51
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puts 'Decimal value of 11110 is ' + binary_to_decimal(11_110).to_s
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# Decimal value of 11110 is 30
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puts 'Decimal value of 101 is ' + binary_to_decimal(101).to_s
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# Decimal value of 101 is 5
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