Python Coding Challenge - Question with Answer (ID 231026)

 

Code Explanation:

1. Understanding the Set {1, True, 1.0, 2}

In Python, a set is a collection that stores unique elements. Duplicate elements are automatically eliminated.

{1, True, 1.0, 2}

This set contains four values:

- 1 — Integer

- True — Boolean

- 1.0 — Float

- 2 — Integer

Although four values are provided, Python checks whether some of them are equivalent.

2. Understanding 1, True, and 1.0

In Python, these values are numerically equal.

print(1 == True)    # Trueprint(1 == 1.0)     # Trueprint(True == 1.0)  # True

Why does this happen?

- True behaves numerically like the integer 1.

- The integer 1 and the float 1.0 represent the same numerical value.

- These values also have equal hash values, allowing Python sets to treat them as equivalent elements.

3. Understanding Duplicate Removal

{1, True, 1.0, 2}

Python treats 1, True, and 1.0 as equivalent when determining set uniqueness. Therefore, they represent just one unique element.

The set effectively contains two unique elements:

{1, 2}

The displayed representation of the equivalent element may depend on which representation was retained.

4. Understanding the len() Function

len({1, True, 1.0, 2})

The len() function returns the number of elements in a collection.

Here:

- 1, True, and 1.0 count as one unique element.

- 2 counts as another unique element.

Therefore, the total number of unique elements is 2.

5. Understanding the print() Function

print(len({1, True, 1.0, 2}))

Python executes this expression in the following order:

1. Creates the set.

2. Identifies equivalent values and retains only unique elements.

3. Uses len() to count the elements.

4. Uses print() to display the result.

✅ Final Output

2

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