String formatting can be used to add leading zeros to a number.

1. Using zfill() Method:
   • Pads the string on the left with zeros.
2. Code Example:
   
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   number = 5
   formatted_number = str(number).zfill(3)
   print(formatted_number)  # Output: "005"
   

   
   
3. Using format() Method:
   • Provides more flexibility and control over formatting.
4. Alternative Code:
   
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   number = 5
   print("{:04d}".format(number))  # Output: "0005"
   

   
   
5. Using F-Strings:
   • Modern and concise method in Python 3.6+.
6. Another Approach:
   
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   number = 5
   print(f"{number:04}")  # Output: "0005"
   

   
   
7. Explanation:
   • zfill() is simple for adding leading zeros.
   • format() and f-strings offer more formatting options and are often preferred for their readability.