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what is a string?

Sting is a collection of Characters.

# syntex:-
    variable = "some_string"
# example:
    userName = "AdminUser"

core concept

🔢 String Indexing

Everything in python is well organized and everything has a number attached to it.

we can access that element directly using that number. In this case, String have a index number attached, the number starts from the 0

example :-

alt

There are two types of Indexing Forward and Backward.

In Forward, the index starts from 0 to the end. In Backward, the index starts from -1 to the end.

example :-

alt

Example:-

strindex = "Python"

print([0])
print([1])
print([-2])
print([-3])

output:-
P
y
o
h

what is String Slicing in Python?

as we all know Slicing meains to cut something in to pieces, like taking a piece of cake.

in this case we slice the string in to peices

# syntex:-
    myString = "python"

    print(myString[1:4])

# output:-
    yth

new Topic Time

String Formatting

Okayyyyyy, String Formatting is something that we always use in coding. We manipulate the input and output

click here or open the stringFormatting.py file from week-1 to see the reference code :-

String formatting is the process of infusing things in the string dynamically and presenting the string. There are four different ways to perform string formatting:-

  • Formatting with % Operator.
  • Formatting with format() string method.
  • Formatting with string literals, called f-strings.
  • Formatting with String Template Class

Formatting string using % Operator

It is the oldest method of string formatting. Here we use the module % operator. The symbol % is also known as the “string-formatting operator”.

x = 'Some String'

print("%s", x)

output :- Some String

note:- we don't this, so you can skip it if u want. Lets continue!!

Formatting string using format() method

Format() method was introduced with Python3 for handling complex string formatting more efficiently.

Formatters work by putting in one or more replacement fields and placeholders defined by a pair of curly braces { } into a string and calling the str.format().

The value we wish to put into the placeholders and concatenate with the string passed as parameters into the format function.

print(‘String here {} then also {}’.format(‘something1′,’something2’))
example:-
    print('We all are {}.'.format('equal'))

Formatted String using F-strings

PEP 498 introduced a new string formatting mechanism known as Literal String Interpolation or more commonly as F-strings (because of the leading f character preceding the string literal). The idea behind f-strings is to make string interpolation simpler.

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(). F-strings provide a concise and convenient way to embed python expressions inside string literals for formatting.

# syntex:-
print(f'text {someVariable}')
# example:-
yourName = "winter_x64"

print(f'my name is {yourName}')

# output:-
'my name is winter_x64'

now we mostly use F-string, so make sure your learn it