Python String zfill() Method
Example
Fill the string with zeros until it is 10 characters long:
    txt = "50"
x = txt.zfill(10)
print(x)
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Definition and Usage
The zfill() method adds zeros (0) at the 
beginning of the string, until it reaches the specified length.
If the value of the len parameter is less than the length of the string, no filling is done.
Syntax
  
    string.zfill(len)
  
Parameter Values
| Parameter | Description | 
|---|---|
| len | Required. A number specifying the desired length of the string | 
More Examples
Example
Fill the strings with zeros until they are 10 characters long:
    a = "hello"
b = "welcome to the jungle"
c = "10.000"
print(a.zfill(10))
print(b.zfill(10))
print(c.zfill(10))
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