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function decimalToBinary(num) {

const bin = []

while (num > 0) {

bin.unshift(num % 2)

num >>= 1 // basically /= 2 without remainder if any

}

return bin.join('')

}

export { decimalToBinary }

// > decimalToBinary(2)

// '10'

// > decimalToBinary(7)

// '111'

// > decimalToBinary(35)

// '100011'