How to Add Leading Zeros to Numbers in Python?

How to Display Numbers with Leading Zeros in Python

If you need to display numbers with leading zeros to ensure a consistent visual format, Python offers several options.

Python 2 and Python 3 (Using %)

You can use the modulo operator (%) to specify the desired number of digits:

number = 1
print("%02d" % (number,))

In this example, d indicates that the number should be displayed with leading zeros up to two digits.

Python 3 (Using Format)

The format() method allows you to achieve the same result:

number = 1
print("{:02d}".format(number))

The format string {:02d} specifies the same behavior as d.

Python 3.6 (Using F-Strings)

F-strings offer a concise syntax for formatting strings:

number = 1
print(f"{number:02d}")

Again, the formatting option specifies the desired number of leading zeros. This technique provides a modern and flexible way to display numbers consistently.

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