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How to Convert a String to a Float Decimal in Python

writter  Sumit Dey Sarkar
Date  22 Apr 2023
Language  Python
How to Convert a String to a Float Decimal in Python

How to Convert a String to a Float Decimal in Python

In this tutorial we will learn how to convert a string to a float decimal in Python.


How to Convert a String to a Float Decimal in Python

Using the built-in float() method in Python, you can change a string into a floating-point decimal number. Here's an example:

string_num = "3.14159"
float_num = float(string_num)

In this example, we first define a string string_num containing the value "3.14159". We then call the float() function and pass the string as an argument. The function returns a float decimal value, which we assign to the variable float_num. Finally, we print the value of float_num.





A ValueError exception will be generated if the string cannot be transformed into a float. For example:

string_num = "not a number"
float_num = float(string_num)



ValueError: could not convert string to float: 'not a number'


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