Strings Formatting in Python

String formatting is the process of infusing things in the string dynamically and presenting the string.

There are 3 different methods to format a string in string

• Old style formatting
• String Format method

• F-string / String interpolation

  Old style formatting technique

  In this technique we need percent symbol % followed by some characters inside the string as placeholder for the values that will be embedded in string.
  There are four placeholder or special symbols:

• %s → string

• %d → integer

• %f → float

• %.(n)f → for floating value with n digit precision (n is a positive integer)
  These symbols are similar that use in c programming language.

Example 1:

a=5
b=3
print(‘%d + %d = %d’%(a,b,a+b))
# 5+ 3 = 8

Example 2:

name= ‘Anuj’
like=’Bikes’
print(‘My name is %s. I like %s’%(name,like))
# My name is Anuj. I like Bikes.

String format Method

In this technique we use string format method. To use format method we need to use pair of empty curly bracket {} for each variable we need to embed in the string at place of brackets

Example 1:

a=5
b=3
print(‘{} + {} = {}’.format(a,b,a+b))
# 5+ 3 = 8

Example 2:

name= ‘Anuj’
like=’Bikes’
print(‘My name is {}. I like {}.’.format(name,like))
# My name is Anuj. I like Bikes.

F-string / Literal string interpolation

To create an f-string, prefix the string with the letter “ f ”. The string itself can be formatted in much the same way that you would with str.format().

Example 1:

a=5
b=3
print(f.‘{a} + {b} = {a+b}’)
# 5+ 3 = 8

Example 2:

name= ‘Anuj’
like=’Bikes’
print(f.‘My name is {name}. I like {like}’)
# My name is Anuj. I like Bikes.

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