str.zfill
Pad the string with zeros on the left up to the length width.
Python 3.13
str.zfill(width)Parameters
- widthint
- The minimum length of the result.
Return value
A new string; if the original is already at least width long, it is returned unchanged.
Examples
Padding with zeros on the left
Python 3.13
print('42'.zfill(5))00042
Zeros after the minus sign
Python 3.13
print('-7'.zfill(4))-007
Details
A leading + or - sign stays first, and the zeros go after it.