Introduction to Arrays in Python

Arrays are one of the most commonly used data structures in programming. They allow us to store multiple values of the same data type in a single variable. In Python, arrays are represented as lists.

Creating an Array

To create an array in Python, you can simply define a list and initialize it with some values. For example:

1# Create an empty list
2numbers = []
3
4# Add elements to the list
5numbers.append(1)
6numbers.append(2)
7numbers.append(3)
8
9print(numbers)  # Output: [1, 2, 3]

Accessing Elements

You can access individual elements of an array using their index. The index of the first element is 0, the second element is 1, and so on. For example:

1print(numbers[0])  # Output: 1
2print(numbers[1])  # Output: 2
3print(numbers[2])  # Output: 3

Modifying Elements

You can modify elements of an array by assigning new values to their respective indices. For example:

1numbers[1] = 4
2print(numbers)  # Output: [1, 4, 3]

Iterating Over an Array

You can iterate over the elements of an array using a for loop. For example:

1for num in numbers:
2  print(num)

This will output each element of the array on a separate line.

In the next lesson, we will explore working with objects and learn how to work with properties in Course course one.

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if __name__ == "__main__":

  # Python logic here

  # Create an empty list

  numbers = []

​

  # Add elements to the list

  numbers.append(1)

  numbers.append(2)

  numbers.append(3)

​

  # Access individual elements

  print(numbers[0])  # Output: 1

  print(numbers[1])  # Output: 2

  print(numbers[2])  # Output: 3

​

  # Modify elements

  numbers[1] = 4

  print(numbers)  # Output: [1, 4, 3]

​

  # Iterate over the list

  for num in numbers:

    print(num)

​

  print("Print something")