How to Format Floating-Point Numbers with Fixed Width in Python?

Formatting Floating Numbers with Fixed Width in Python

Python provides a versatile method to format floating numbers with a fixed width, ensuring alignment and precision.

Problem Requirements:

• Leading zero for numbers less than 1
• Trailing decimal zeroes to fill up fixed width
• Truncation of decimal digits beyond fixed width
• Alignment of all decimal points

Solution Using format() Method:

Python's format() method offers a comprehensive solution to meet these requirements:

numbers = [23.23, 0.1233, 1.0, 4.223, 9887.2]

for x in numbers:
    print("{:10.4f}".format(x))

Format Specifier Breakdown:

The format specifier within the curly braces adheres to the Python format string syntax and comprises the following components:

• Empty string: Specifies the first provided argument to format(), in this case, the variable x.
• 10.4f: Defines the format specification.
• f: Denotes fixed-point notation.
• 10: Sets the total field width, left-padded with spaces.
• 4: Specifies the number of digits after the decimal point.

Output:

The code output adheres to the specified requirements:

   23.2300
    0.1233
    1.0000
    4.2230
 9887.2000

This approach effectively aligns decimal points, adds leading zeroes for values less than 1, suffixes trailing decimal zeroes as necessary, and truncates any digits exceeding the specified fixed width.

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