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Operations on Dictionary

A dictionary is a collection of key-value pairs. Dictionaries are defined by enclosing elements in curly braces { }.
Creating a Dictionary
A dictionary can be created by enclosing key-value pairs in curly braces {}, with each pair separated by commas. Within
each pair, the key and value are divided by a colon “:”
# Creating a dictionary
car = {
"make": "Toyota",
"model": "Camry",
"year": 2021,
"colour": "Blue"
}
You can access the values in a dictionary by using the keys as shown:
print(car) # Output: {'make': 'Toyota', 'model': 'Camry', 'year': 2021, 'colour':
'Blue'}
print(car["make"]) # Output: Toyota
print(car["year"]) # Output: 2021

Mutability
In dictionaries, keys are immutable whereas values are mutable. You can change the values using the respective keys:

car["colour"]="Grey"
print(car) #Ouput: {'make': 'Toyota', 'model': 'Camry', 'year': 2021, 'colour': 'Grey'}
You can also add key-value pairs in an existing dictionary:
car["mileage"] = 15000
print (car) #Ouput: {'make': 'Toyota', 'model': 'Camry', 'year': 2021, 'colour':
'Grey', 'mileage': 15000}

Control Statements
Control statements in programming languages are essential tools that allow developers to dictate the flow of execution
within their code. Depending on how the statements in a program will be executed, the flow of control in a program can
be broadly classified into three types:
Sequence Statements
Conditional Statements
Iterative Statements
Sequence Statement
In Python, a sequence statement refers to a set of instructions that are executed in the order they appear. This is the most
straightforward form of control flow.

Program 13: To demonstrate the concept of Sequence statement
# Perform an Addition
num1 = 10
num2 = 20
result = num1 + num2
# Display the result
print("The result of", num1, "+", num2, "is:", result)

70 Touchpad Artificial Intelligence - XI