Strings

What Are Strings?

Strings in Python are sequences of characters surrounded by either single (') or double (") quotation marks.

Examples:

Displaying strings with the print() function:
python
```
print("Hello")
print('Hello')
```
- Output: Hello
- Output: Hello

Quotes Inside Quotes:

You can use quotes inside a string as long as they don't match the quotes surrounding the string:
python
```
print("It's alright")
print("He is called 'Johnny'")
print('He is called "Johnny"')
```
- Output: It's alright
- Output: He is called 'Johnny'
- Output: He is called "Johnny"

Assign String to a Variable:

Assigning a string to a variable:
python
```
a = "Hello"
print(a)
```
- Output: Hello

Multiline Strings:

You can assign a multiline string using three quotes:
python
```
a = """Lorem ipsum dolor sit amet,
consectetur adipiscing elit,
sed do eiusmod tempor incididunt
ut labore et dolore magna aliqua."""
print(a)
```
- Output: Lorem ipsum dolor sit amet,
  consectetur adipiscing elit,
  sed do eiusmod tempor incididunt
  ut labore et dolore magna aliqua.

Strings are Arrays:

Strings are arrays of bytes representing unicode characters. Access elements using square brackets:
python
```
a = "Hello, World!"
print(a[1])  
```
- Output: e

String Length:

Use the len() function to get the length of a string:
python
```
a = "Hello, World!"
print(len(a)) 
```
- Output: 13

Check String:

To check if a certain phrase or character is present in a string, use the in keyword:
python
```
txt = "The best things in life are free!"
print("free" in txt)  
```
- Output: True

Summary:

Strings in Python are versatile and widely used for text manipulation. Understanding how to create, access, and modify strings is fundamental for any programmer. Practice these examples and exercises to become proficient in working with strings in Python!