Jabarkan =  = 0.01010101...2 dari Sistim panomeran binér dalam bahasa sunda

=  = 0.10110100 10110100 ...2

The phenomenon that the binary representation of any rational is either terminating or recurring also occurs in other radix-based numeral systems.  See, for instance, the explanation in decimal.  Another similarity is the existence of alternative representations for any terminating representation, relying on the fact that 0.111111... is the sum of the geometric series 2−1 + 2−2 + 2−3 + ... which is 1.

Binary numerals which neither terminate nor recur represent irrational numbers.  For instance,

0.10100100010000100000100.... does have a pattern, but it is not a fixed-length recurring pattern, so the number is irrational

1.0110101000001001111001100110011111110... is the binary representation of , the square root of 2, another irrational.  It has no discernible pattern, although a proof that  is irrational requires more than this. See irrational number.