Tuple Short Questions

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Q.1: What is a Tuple in Python?

• A tuple is a built-in data type in Python used to store a collection of items.
• Ordered: Elements have a defined order.
• Immutable: Cannot add, remove, or change elements after creation.
• Allows duplicates: Can store repeated values.
• Heterogeneous: Can store elements of different data types.

Example:

my_tuple = (10, 20, 30)
print(my_tuple[0])  # Output: 10

Why use tuples?

• Faster than lists.
• Used for fixed collections (e.g., coordinates, settings).
• Can be used as dictionary keys (if elements are immutable).
• Help ensure data integrity (unchanged data).

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Q.2: What is Indexing?

• Indexing = Accessing elements by their position (index).
• Index starts from 0.

Example:

my_list = [10, 20, 30, 40]
print(my_list[0])  # Output: 10
print(my_list[2])  # Output: 30

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Q.3: What is Slicing?

• Extracting a portion (subsequence) of a list, tuple, or string.
• Syntax: sequence[start : stop : step]

Examples:

my_list = [10, 20, 30, 40, 50, 60]
print(my_list[1:4])   # [20, 30, 40]
print(my_list[:3])    # [10, 20, 30]
print(my_list[3:])    # [40, 50, 60]
print(my_list[::2])   # [10, 30, 50]
print(my_list[::-1])  # [60, 50, 40, 30, 20, 10]

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Q.4: Indexing and Slicing with Negative Indices

• Negative indices start from -1 (last element), -2 (second last), etc.

Example:

my_list = [10, 20, 30, 40, 50]
print(my_list[-1])   # 50
print(my_list[-2])   # 40
print(my_list[-4:-1])  # [20, 30, 40]
print(my_list[-3:])    # [30, 40, 50]
print(my_list[::-1])   # [50, 40, 30, 20, 10]

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