The syntax of zfill() in Python is:
str.zfill(width)
zfill() Parameter
zfill() takes a single character width.
The width specifies the length of the returned string from zfill() with 0 digits filled to the left.
Return Value from zfill()
zfill() returns a copy of the string with 0 filled to the left. The length of the returned string depends on the width provided.
- Suppose, the initial length of the string is 10. And, the width is specified 15. In this case,
zfill()returns a copy of the string with five '0' digits filled to the left. - Suppose, the initial length of the string is 10. And, the width is specified 8. In this case,
zfill()doesn't fill '0' digits to the left and returns a copy of the original string. The length of the returned string in this case will be 10.
Example 1: How zfill() works in Python?
text = "program is fun" print(text.zfill(15)) print(text.zfill(20)) print(text.zfill(10)) Output
0program is fun 000000program is fun program is fun
If a string starts with the sign prefix ('+', '-'), 0 digits are filled after the first sign prefix character.
Example 2: How zfill() works with Sign Prefix?
number = "-290" print(number.zfill(8)) number = "+290" print(number.zfill(8)) text = "--random+text" print(text.zfill(20)) Output
-0000290 +0000290 -0000000-random+text
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