Python Coding Challenge - Question with Answer (ID 251026)

 

Explanation:

1. Understanding False and True

In Python, bool is a subclass of int.

- False behaves numerically like 0.

- True behaves numerically like 1.

For example:

print(int(False))  # 0print(int(True))   # 1

Therefore, in arithmetic expressions, Python can use True and False as numeric values.

2. Understanding the Bitwise NOT Operator (~)

Consider this expression:

~False

Since False behaves like integer 0, this becomes:

~0

The bitwise NOT operator flips the bits of an integer. In Python, the result follows this identity:

\[

\sim x = -x - 1

\]

Therefore:

\[

\sim 0 = -0 - 1 = -1

\]

So:

~False

returns -1.

3. Understanding Multiplication

Now evaluate:

True * 3

Since True behaves like 1:

\[

1 \times 3 = 3

\]

The result is 3.

4. Understanding Operator Precedence

The original expression is:

~False + True * 3

Python evaluates multiplication before addition. The bitwise NOT applies to False before the addition as well.

The expression can be evaluated as:

(-1) + (1 * 3)

First, multiplication:

\[

1 \times 3 = 3

\]

Then addition:

\[

-1 + 3 = 2

\]

5. Understanding the print() Function

print(~False + True * 3)

The print() function displays the final calculated result.

Final output:

2

Books: Python for Chemistry from Fundamentals to Real-World Applications