1:59

3:53

2:56

3:53

3:54

A real data type is a data type used in a computer program to represent an approximation of a real number.
Because the real numbers are not countable, computers cannot represent them exactly using a finite amount of information.
Most often, a computer will use a rational approximation to a real number.

### Rational numbers

### Fixed-point numbers

### Floating-point numbers

### Decimal numbers