Python coding challenge - Day 6 | Output Prediction MCQ

 What Is the Output of This Python Code?

Question:

x = [1, 2, 3]

print(x[1:])

Options:

A) [1, 2, 3]

B) [1, 2]

C) [2, 3]

D) Error

Correct answer :

C) [2, 3]




Explanation :

First we create a list:

x = [1, 2, 3]

The list contains three elements .

Index positions:

Index :   0   1   2

Value :   1   2   3

Step 1 - List slicing

x[1:]

This is called list slicing.

Syntax :

list[start : end]

• Start →  index where slicing begins
• end →  index where slicing stops (not included)

If end is not given python takes elements until end of the list.

Step 2 - Applying the slice

x[1:]

Start form index 1.

Index 1 → value 2

Index 2 → value 3

So the result becomes.

[2, 3]

Final output :

[2, 3]

Key points :

List slicing is used to extract a part of the list.

Examples :

x[0:2] → [1, 2]

x[:2]  → [1, 2]

x[1:]  → [2, 3]

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