How to Convert Strings to Floats and Integers in Python?

Parsing Strings to Floats and Integers in Python

Converting strings to numeric data types is a common task in programming. Python provides built-in functions that effortlessly perform these conversions.

Converting Strings to Floats

To parse a string into a floating-point number, use the float() function. For example:

>>> a = "545.2222"
>>> float(a)
545.22220000000004 # Note the precision loss

The float() function attempts to convert the entire string to a float. If it encounters non-numeric characters, a ValueError is raised.

Converting Strings to Integers

To parse a string into an integer, use the int() function. However, this function by default converts the entire string to an integer, which may not be desired in all cases.

>>> b = "31"
>>> int(b)
31

If you wish to convert only the numeric portion of a string, you can first convert it to a float and then truncate it to an integer:

>>> c = ">>> a = "31.6666""
>>> int(float(c))
31

This approach ensures that the fractional part of the number is discarded, leaving only the integer value.

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