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Python String | zfill() method with Examples

Python String zfill() method with Examples on capitalize(), center(), count(), encode(), find(), format(), index(), join(), lower(), ljust(), isupper(), istitle(), isspace(), isprintable(), isnumeric(), islower() etc.

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Python String zfill() Method

Python zfill() method fills the string at left with 0 digit to make a string of length width. It returns a string contains a sign prefix + or - before the 0 digit.

It returns original length string if the width is less than string length.

Signature

zfill(width)

Parameters

width : length of the string.

Return

It returns a string.

Let's see some examples of zfill() method to understand it's functionality.

Python String zfill() Method Example 1

Let's see an example which has width greater than string length. It returns a new string containing 0 to the left and total length is equal to width.

# Python zfill(width) method 
# Declaring variables
text = "Zfill Example"
# Calling Function
str2 = text.zfill(20)
# Displaying result
print(str2)

Output:

0000000Zfill Example

Python String zfill() Method Example 2

Here, we are passing width less than the string length therefore it returns the original string without filling zeros to the left.

# Python zfill(width) method 
# Declaring variables
text = "Zfill Example"
# Calling Function
str2 = text.zfill(5)
# Displaying result
print(str2)

Output:

Zfill Example

Python String zfill() Method Example 3

This example describes the sign either + or - includes before the zero fills to the left of the string. See every value is filled after prefixing (+ or -) sign. 

# Python zfill(width) method 
# Declaring variables
val = "+100"
val2 = "-200"
val3 = "--Rohan--"
# Calling Function
str2 = val.zfill(10)
str3 = val2.zfill(10)
str4 = val3.zfill(10)

# Displaying result
print(str2)
print(str3)
print(str4)

Output:

+000000100
-000000200
-0-Rohan--

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