The float() method is used to return a floating point number from a number or a string.
The method only accepts one parameter and that is also optional to use. Let us look at the various types of argument, the method accepts:
- A number : Can be an Integer or a floating point number.
- A String :
- Must contain numbers of any type.
- Any left or right whitespaces or a new line is ignored by the method.
- Mathematical Operators can be used.
- Can contain NaN, Infinity or inf (any cases)
Values that the float() method can return depending upon the argument passed
- If an argument is passed, then the equivalent floating point number is returned.
- If no argument is passed then the method returns 0.0 .
- If any string is passed that is not a decimal point number or does not match to any cases mentioned above then an error will be raised.
- If a number is passed outside the range of Python float then OverflowError is generated.
Now let us look at various examples and the working of float() method.
21.89 8.0 23.0 -16.54 -24.45 inf inf nan nan
All lines are executed properly but the last one which will return an error:
Traceback (most recent call last): File "/home/21499f1e9ca207f0052f13d64cb6be31.py", line 25, in print(float("Geeks")) ValueError: could not convert string to float: 'Geeks'
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course