How to Pad Strings and Numbers with Zeros in Python?

Padding Strings with Zeros

In Python, strings and numbers can be padded with zeros to a specific length. Here's how to achieve this:

Padding Strings

To pad a string with zeros, use the zfill() method. For example:

n = '4'
print(n.zfill(3))  # Output: 004

This will pad the string with zeros until it reaches the specified length.

Padding Numbers

Numbers can be padded with zeros using various methods:

• Formatted String Literals (f-strings):

n = 4
print(f'{n:03}')  # Output: 004

• Formatted String Operator:

n = 4
print('%03d' % n)  # Output: 004

• String Format Method:

n = 4
print(format(n, '03'))  # Output: 004

• Named Formatted Strings:

n = 4
print('{0:03d}'.format(n))  # Output: 004

• Keyword Formatted Strings:

n = 4
print('{foo:03d}'.format(foo=n))  # Output: 004

• String Interpolation:

n = 4
print('{:03d}'.format(n))  # Output: 004

For more information on string formatting, refer to the official Python documentation.

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