code: func countLeadingZeroes(i int, word int32) int {
  	leading := 0
  	for word < powers10[i] {
  		i--
  		leading++
  	}
  	return leading
  }
docs: /*
    countLeadingZeroes returns the number of leading zeroes that can be removed from fraction.
  
    @param   i    start index
    @param   word value to compare against list of powers of 10
  */