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In Python, f-strings provide a concise and expressive way to format strings. One powerful feature of f-strings is the ability to control the precision of floating-point numbers directly within the string interpolation. This tutorial will guide you through the use of precision in f-strings with code examples.
The basic syntax of an f-string involves prefixing the string with the letter "f" and embedding expressions inside curly braces {}. Precision can be specified for floating-point numbers using a colon followed by the number of decimal places.
To control the precision of a floating-point number, you can include a colon : followed by the number of decimal places you want. Let's look at an example:
In this example, :.2f specifies that the value of pi should be formatted with two decimal places.
You can also use variables inside the precision specifier. For instance:
Here, :.2f is used to format the final_price variable with two decimal places.
You can apply precision to mathematical expressions directly within the f-string:
This example showcases how to format the result of a mathematical expression with three decimal places.
For scientific notation, you can use the e format specifier:
Here, :.2e formats the large_number variable in scientific notation with two decimal places.
Python f-strings provide a flexible and readable way to format strings, including precision control for floating-point numbers. By using the colon followed by precision specifiers, you can tailor the output to meet your specific formatting needs. This tutorial covered basic syntax, precision with variables, mathematical expressions, and scientific notation. Experiment with different precision values to achieve the desired formatting in your f-strings.
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