One-Dimensional Arrays

Arrays are like neat rows of parked cars, each with its own spot. A one-dimensional array is just a single row, perfect for keeping things in order! Let’s see how to use them in both pseudo-code and Python.

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Declaration and Initialization

Pseudo-Code:

DECLARE MyArray : ARRAY[1:5] OF INTEGER
MyArray[1] ← 10
MyArray[2] ← 20
MyArray[3] ← 30
MyArray[4] ← 40
MyArray[5] ← 50

Python:

MyArray = [10, 20, 30, 40, 50]

No need to declare the size beforehand in Python—just create and fill it!

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Index-Based Access and Assignment

Accessing Elements

Pseudo-Code:

OUTPUT MyArray[3]

Python:

print(MyArray[2])  # Python uses 0-based indexing

Output:

30

"Third car in the row? It’s the shiny red one!" 🚗✨

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Changing an Element

Pseudo-Code:

MyArray[2] ← 25

Python:

MyArray[1] = 25

Now the second element is updated. 🚀

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Example: Storing Student Marks 🎓

Pseudo-Code:

DECLARE Marks : ARRAY[1:3] OF INTEGER
Marks[1] ← 85
Marks[2] ← 90
Marks[3] ← 95
OUTPUT "First student scored: " + Marks[1]

Python:

Marks = [85, 90, 95]
print("First student scored:", Marks[0])

Output:

First student scored: 85

"You’ve got a bright class there!" 🌟

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Traversing the Array

Pseudo-Code:

FOR Index ← 1 TO 5
    OUTPUT MyArray[Index]
NEXT Index

Python:

for Index in range(5):
    print(MyArray[Index])

Output:

10
20
30
40
50

"A walk down the row of cars, admiring each one." 🚶‍♂️

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