Pandas: Add leading zeros to the character column in a pandas series and makes the length of the field to 8 digit

Last update on September 09 2025 12:40:20 (UTC/GMT +8 hours)

4. Add Leading Zeros to Characters

Write a Pandas program to add leading zeros to the character column in a pandas series and makes the length of the field to 8 digit.

Sample Solution:

Python Code :

import pandas as pd
nums = {'amount': ['10', '250', '3000', '40000', '500000']}
print("Original dataframe:")
df = pd.DataFrame(nums)
print(df)
print("\nAdd leading zeros:")
df['amount'] = list(map(lambda x: x.zfill(10), df['amount']))
print(df)

Sample Output:

Original dataframe:
   amount
0      10
1     250
2    3000
3   40000
4  500000

Add leading zeros:
       amount
0  0000000010
1  0000000250
2  0000003000
3  0000040000
4  0000500000

For more Practice: Solve these Related Problems:

Write a Pandas program to format a character series by padding each value with leading zeros until the length reaches 8.
Write a Pandas program to convert a text column to a uniform 8-character string with leading zeros added where needed.
Write a Pandas program to update a series of strings by prepending zeros to each entry so that the total length equals 8 characters.
Write a Pandas program to process a character column to add leading zeros dynamically based on the current length of each string.

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Python Code Editor:

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