Strings

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What are Strings?

• Strings are a data type.
• It is a sequence of characters (letters, numbers, symbols, spaces) enclosed in quotes.

  Examples:

myName = "Aneesh"
myNameType = type(myName).__name__

print(f"{myName} is a {myNameType} data type.")

Aneesh is a str data type.

word = "hello" # <-- Here, we use double quotes instead of single quotes
sentence = 'Python is fun!' # <-- Here, we use single quotes instead of double quotes
# Both are valid ways to define strings in Python
multiline = """This is 
a multi-line
string.""" # <-- Triple quotes allow for multi-line strings
print(word)
print(sentence)
print(multiline)

hello
Python is fun!
This is 
a multi-line
string.

Common String Operations

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name = "Aneesh"

print(name.upper())     # "ANEESH"
print(name.lower())     # "aneesh"
print(len(name))        # 6
print(name[0])          # "A" (first character)
print(name[-1])         # "h" (last character)
print(name[1:3])        # "ne" (slice)

ANEESH
aneesh
6
A
h
ne

JavaScript

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%%js

let firstName = "Ethan"; // define variables
let lastName = "Patel"; // define variables

console.log(firstName.concat(" ", lastName)); // concat is used in JavaScript to combine strings

let fullName = "Moiz Lukmani"; // define variables

console.log(fullName.substring(0,4)); //substring in JavaScript chooses the letter defined by the index

<IPython.core.display.Javascript object>

Combining Strings

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first = "Hello"
second = "World"

print(first + " " + second)        # "Hello World"
print(first + ", " + second + "!") # "Hello, World!"
print("{} {}".format(first, second))       # "Hello World" (str.format)
print(f"{first}, {second}!")       # "Hello, World!" (f-string) 

Hello World
Hello, World!
Hello World
Hello, World!

Popcorn Hacks 1

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playerName = "Neil Manjrekar"   # <-- Add your own name
# <-- Add a variable called "welcomeMessage" and set the variable equal to "Welcome to the game!"

# Print welcome message
print(welcomeMessage + ", " + playerName + "!")

Popcorn Hacks 2

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# Create a game title
gameTitle = ""   # <-- Add your favorite game title (ex: "Tic Tac Toe")

# Print the title in uppercase
print(gameTitle.upper())   # <-- What will this display?

# Get the length of the title
titleLength = len(gameTitle)
print("Your game title has " + str(titleLength) + " characters.")

Popcorn Hack 3

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%%js
let fullName = "Tanay Paranjpe";   // <-- Add your full name

// Extract first name (characters before the space)
let firstName = fullName.substring(0,100);   // <-- Change the numbers to get the first name correctly

// Extract last name (characters after the space)
let lastName = fullName.substring(100);   // <-- Change this to get the last name correctly

// Print results
console.log("First: " + firstName);
console.log("Last: " + lastName);

<IPython.core.display.Javascript object>

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MCQ

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