What is the radix point?

In mathematics and computing, a radix point (or radix character) is the symbol used in numerical representations to separate the integer part of a number (to the left of the radix point) from its fractional part (to the right of the radix point). "Radix point" is a general term that applies to all number bases. In base 10 notation, the radix point is more commonly called the decimal point, where the prefix deci- implies base 10. Similarly, the term "binary point" is used for base 2.

Some articles on radix point:

Positional Notation - Mathematics - Exponentiation
... raised to the nth power, where n is the number of other digits between a given digit and the radix point ... If a given digit is on the left hand side of the radix point (i.e ... digit is on the right hand side of the radix point (i.e ...
Quater-imaginary Base - Radix Point "."
... A radix point in the decimal system is the usual ... In the quater-imaginary system a radix point can also be used ... For a digit string the radix point marks the separation between positive and negative powers of b ...
Radix Point - Examples
... In base 10 (decimal) 13.625 In this example, 13 is the integer to the left of the radix point, and 625 (i.e ... as It is now seen that 1101, which is to the left of the radix point, is the binary representation of the decimal number 13 ... To the right of the radix point is 101, which is the binary representation of the decimal fraction 625/1000 (or 5/8) ...

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