Decimal To Binary Algorithm

In computing and electronic systems, binary-coded decimal (BCD) is a class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, normally four or eight. In byte-oriented systems (i.e. most modern computers), the term unpacked BCD normally imply a full byte for each digit (often including a sign), whereas packed BCD typically encodes two decimal digits within a individual byte by take advantage of the fact that four bits are enough to represent the range 0 to 9.
function decimalToBinary (num) {
  var bin = []
  while (num > 0) {
    bin.unshift(num % 2)
    num >>= 1 // basically /= 2 without remainder if any
  }
  console.log('The decimal in binary is ' + bin.join(''))
}

decimalToBinary(2)
decimalToBinary(7)
decimalToBinary(35)

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