Band count changes the positional grammar. Four bands encode two significant digits, a multiplier, and tolerance. Five bands add a third significant digit before the multiplier. Six bands keep that five-band value and tolerance structure, then add a temperature-coefficient band. More bands do not by themselves establish power rating, construction, quality, or suitability.
The third digit changes representable detail
A four-band code represents a two-digit significand from 10 through 99, scaled by the multiplier. A five- or six-band code represents 100 through 999. Thus 10 kΩ in five bands is 100 × 10²: brown–black–black–red, before tolerance. The encoder changes format only when the user asks; it never pads or rounds a value to force a different band count.
The sixth band is TCR, not another value digit
The sixth band reports temperature coefficient in parts per million per kelvin. It does not increase the three significant digits used for nominal resistance. ResistorCode displays the selected ppm/K code but does not calculate operating resistance, because that would also require a defined reference temperature, temperature change, component behavior, and datasheet limits.