How Do I Parse Strings into Floats or Integers in Python?

Parsing Strings into Float or Int

When working with strings in Python, there may be situations where it becomes necessary to convert them into numeric data types such as floats or ints. This conversion process involves "parsing" the string to extract the numeric value within.

To parse a string into a float, one can simply use the float() function. For example:

a = "545.2222"
float_value = float(a)
print(float_value)  # Output: 545.22220000000004

Note that Python's float() function may introduce a small amount of precision error due to the internal representation of floating-point numbers.

To parse a string into an int, one can first convert it to a float using float(), and then use int() to round the float to the nearest integer value. For example:

b = "31"
int_value = int(float(b))
print(int_value)  # Output: 31

This two-step conversion approach ensures that the resulting int is precise and does not introduce any errors.

By leveraging these conversion functions, you can seamlessly convert strings containing numeric data into their respective float or int counterparts, allowing you to perform mathematical operations and other tasks involving numeric values.

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