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# Python float() Example | float() Function In Python Tutorial

Python float() is an inbuilt method that is used to return a floating-point number from a number or a string. The float() function converts the specified value into a floating-point number. The float() method only accepts one parameter and that is also optional to use.

## Python float()

The float() method returns:

1. Equivalent floating-point number if an argument is passed
2. 0.0 if no arguments passed
3. OverflowError exception if the argument is outside the range of Python float

#### Syntax

`float(value)`

It takes one parameter, which is value, and that is optional. A value is a number or a string that can be converted into a floating-point number.

See the following code example.

```# app.py

data = float(11)
print(data)```

See the following output.

```➜  pyt python3 app.py
11.0
➜  pyt```

## #Different parameters with float()

 Float number Use as a floating number Integer Use as integer String Must contain decimal numbers. Leading and trailing whitespaces are removed. Optional use of “+”, “-” signs. It could contain NaN, Infinity, inf (lowercase or uppercase).

## #float() for infinity and Nan

See the following code example.

```# app.py

print(float("NaN"))

print(float("inf"))
print(float("infinity"))```

We have tried to convert the NaN and infinity into the float point number. See the following output.

```➜  pyt python3 app.py
nan
inf
inf
➜  pyt```

## #float() for String

See the following code example.

```# app.py

print(float("11.21"))
print(float("19.21"))
```

See the following output.

```➜  pyt python3 app.py
11.21
19.21
➜  pyt```

Finally, Python float() Example Tutorial is over.

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