Python String zfill() method

Python String zfill()

Python String.zfill() is used to fill zeroes at the beginning of this string, until it reaches the given target length of the string. lstrip() method returns a new resulting string and does not modify the original string.

In this tutorial, we will learn the syntax and examples for zfill() method of String class.

Syntax

The syntax to call zfill() method on string x in Python is

x.zfill(characters)

where

Parameter	Required / Optional	Description
len	Required	A number.

Examples

In the following program, we take a string '3.05', and append zeroes at the beginning for a target length of 6 using zfill() method.

Example.py

x = '3.05'
result = x.zfill(6)
print('Original String : ', x)
print('Result String   : ', result)

Output

Original String :  3.05
Result String   :  003.05

If the length parameter is less than the length of this string, then the original string value is returned, without any modification.

Example.py

x = '3.05'
result = x.zfill(2)
print('Original String : ', x)
print('Result String   : ', result)

Output

Original String :  3.05
Result String   :  3.05

Conclusion

In this Python Tutorial, we learned how to fill zeroes at the beginning of the string using zfill() method, with examples.