Radix point

In mathematics and computing, a radix point (or radix character) is a symbol used to separate whole numbers (integers) from fractions. For example, the number ${\displaystyle 1200.25}$ represents an integer of 1200 with a fractional part of 25, and these are separated with a decimal point.

Radix point is the umbrella term for this point in all bases. The most commonly known example is the decimal point, named so for its use in base 10 notation. Similarly, "binary point" is used for base 2. In most English-speaking countries the radix point is usually a small dot (.), but this can vary as other languages can use different notation such as a comma (,) instead.