Python Coding Challange - Question with Answer (01180825)

Let's break down the code step-by-step:

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✅ Code

from array import array
a = array('i', [1, 2, 3])
a.append(4)
print(a)

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🔍 Step-by-step Explanation

1. Importing the array module

from array import array

• You're importing the array class from Python's built-in array module.

• The array module provides an array data structure that is more efficient than a list if you're storing many elements of the same data type.

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2. Creating an array

a = array('i', [1, 2, 3])

• This creates an array named a.

• 'i' stands for integer (signed int) — this means all elements in the array must be integers.

• [1, 2, 3] is the list of initial values.

So now:

a = array('i', [1, 2, 3])

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3. Appending an element

a.append(4)

• This adds the integer 4 to the end of the array.

• After this, the array becomes: array('i', [1, 2, 3, 4])

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4. Printing the array

print(a)

• This prints the array object.

• Output will look like:

array('i', [1, 2, 3, 4])

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✅ Final Output

array('i', [1, 2, 3, 4])

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📝 Summary

• array('i', [...]) creates an array of integers.

• .append() adds an element to the end.

• The printed result shows the array type and contents.

Python for Backend Development