Python | Padding a string upto fixed length

Given a string, the task is to pad string up to given specific length with whitespaces. Let’s discuss few methods to solve the given task.

Method #1: Using ljust()

# Python code to demonstrate
# pad spaces in string
# upto fixed length

# initialising string
ini_string = "123abcjw"
padding_size = 15

# printing string and its length
print ("initial string : ", ini_string, len(ini_string))

# code to pad spaces in string
res = ini_string.ljust(padding_size)

# printing string and its length
print ("final string : ", res, len(res))

Output:

initial string :  123abcjw 8
final string :  123abcjw        15

Method #2: Using format

# Python code to demonstrate
# pad spaces in string
# upto fixed length

# initialising string
ini_string = "123abcjw"

# printing string and its length
print ("initial string : ", ini_string, len(ini_string))

# code to pad spaces in string
res = "{:<15}".format(ini_string)

# printing string and its length
print ("final string : ", res, len(res))

Output:

initial string :  123abcjw 8
final string :  123abcjw        15

Method #3: Using operators( * and +)

# Python code to demonstrate
# pad spaces in string
# upto fixed length

# initialising string
ini_string = "123abcjw"
padding_size = 15

# printing string and its length
print ("initial string : ", ini_string, len(ini_string))

# code to pad spaces in string
res = ini_string + " "*(padding_size - len(ini_string))

# printing string and its length
print ("final string : ", res, len(res))

Output:

initial string :  123abcjw 8
final string :  123abcjw        15