# Python | Float type and its methods

The `float `type in Python represents the floating point number. Float is used to represent real numbers and is written with a decimal point dividing the integer and fractional parts. For example, 97.98, 32.3+e18, -32.54e100 all are floating point numbers.

Python float values are represented as 64-bit double-precision values. The maximum value any floating-point number can be is approx 1.8 x 10308. Any number greater than this will be indicated by the string `inf `in Python.

 `# Python code to demonstrate float values. ` ` `  `print``(``1.7e308``) ` ` `  `# greater than 1.8 * 10^308 ` `# will print 'inf' ` `print``(``1.82e308``) `

Output:

```1.7e+308
inf```

Floating-point numbers are represented in computer hardware as base 2 (binary) fractions. For example, the decimal fraction 0.125 has value 1/10 + 2/100 + 5/1000, and in the same way the binary fraction 0.001 has value 0/2 + 0/4 + 1/8. These two fractions have identical values, the only real difference being that the first is written in base 10 fractional notation, and the second in base 2.
Unfortunately, most decimal fractions cannot be represented exactly as binary fractions. A consequence is that, in general, the decimal floating-point numbers you enter are only approximated by the binary floating-point numbers actually stored in the machine.

The `float `type implements the `numbers.Real` abstract base class. Returns an expression which is converted into floating point number. `float `also has the following additional methods:

float.as_integer_ratio() : Returns a pair of integers whose ratio is exactly equal to the actual float having a positive denominator.In case of infinites, it raises overflow error and value errors on Not a number (NaNs).

 `# Python3 program to illustrate ` `# working of float.as_integer_ratio() ` ` `  `def` `frac(d): ` `     `  `    ``# Using as_integer_ratio ` `    ``b ``=` `d.as_integer_ratio()  ` `     `  `    ``return` `b  ` `# Driver code ` `if` `__name__``=``=``'__main__'``: ` `    ``b ``=` `frac(``3.5``)  ` `    ``print``(b[``0``], ``"/"``, b[``1``]) `

Output:

```7 / 2
```

float.is_integer() : Returns True in case the float instance is finite with integral value, else, False.

 `# Python3 program to illustrate ` `# working of float.is_integer() ` ` `  `def` `booln(): ` `     `  `    ``# using is_integer ` `    ``print``((``-``5.0``).is_integer()) ` `    ``print``((``4.8``).is_integer()) ` `    ``print``(``float``.is_integer(``275.0``)) ` ` `  `# Driver code ` `if` `__name__``=``=``'__main__'``: ` `    ``booln() `

Output:

```True
False
True
```

float.hex() : Returns a representation of a floating-point number as a hexadecimal string.

 `# Python3 program to illustrate ` `# working of float.hex() ` ` `  `def` `frac(a):  ` `     `  `    ``# using float.hex() ` `    ``a ``=` `float``.``hex``(``35.0``) ` `     `  `    ``return` `a  ` `# Driver code ` `if` `__name__``=``=``'__main__'``: ` `    ``b ``=` `frac(``35.0``)  ` `    ``print``(b) `

Output:

```'0x1.1800000000000p+5'
```

float.fromhex(s) : Returns the float represented by a hexadecimal string s. String s may have leading and trailing whitespaces.

 `# Python3 program to illustrate ` `# working of float.fromhex() ` ` `  `def` `frac(a): ` `     `  `    ``# using a float.fromhex() ` `    ``a ``=` `float``.fromhex(``'0x1.1800000000000p+5'``) ` `     `  `    ``return` `a ` `     `  `# Driver code     ` `if` `__name__``=``=``'__main__'``: ` `    ``b ``=` `frac(``'0x1.1800000000000p+5'``)  ` `    ``print``(b) `

Output:

```35.0
```

Note : float.hex() is an instance method, but float.fromhex() is a class method.

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