Quantum Computing, Quantum Algorithms.
0.0 to 1.0 as a decimal fraction. Half a circle. The other half of the circle merely retraces the first half, back to where it started. Zero to pi and pi to two pi radians, 0 to 180 degrees and then 180 degrees to 360 degrees, and 0.0 to 0.5 and then 0.5 to 1.0 as a decimal fraction. Two half