Does canvas support floating point numbers when drawing line or arc?

In the canvas element, are floating point numbers actually treated as floats by the lineTo and arc methods?

For example:

context.moveTo(20.4562, 80.8923);
context.lineTo(120.1123, 90.2134);
context.arc(24.5113, 36.7989, 20.123, 0, Math.PI*2); 

Does canvas really support float number coordinates, or it just converting the float numbers to integers when drawing line, arc, rect, etc.?