Python Strings

Python Strings

What is a String?

A string is a group of characters (letters, numbers, or symbols).

Example:

"hello"
'Python'
"""This is a multiline string"""

You can use 'single', "double", or """triple""" quotes.

Accessing Characters in a String

You can get any character from a string by its position (index).

1. Positive Index (starts from 0)

name = "Python"
print(name[0])   # P
print(name[1])   # y

2. Negative Index (starts from -1)

print(name[-1])  # n (last letter)
print(name[-2])  # o

3. Slicing (get part of a string)

word = "Balochistan"
print(word[0:5])  # Baloch
print(word[:6])   # Baloch
print(word[2:])   # lochistan

Remember: the last index number is not included.

String Operators

“in” and “not in” Operators

Used to check if a word is inside a string.

text = "University of Turbat"
print("Turbat" in text)   # True
print("UOT" not in text)  # True

In if condition:

if "Baloch" in text:
    print("Found!")
else:
    print("Not found!")

Useful String Functions

Strings Can’t Be Changed

Strings are immutable (cannot be changed).

word = "computer"
word[0] = "C"   # Error

Common String Methods