Tech

What will be the output of the print(6 + 5 / 4 ** 2 // 5 + 8)?

Evaluate the Python expression 'print(6 + 5 / 4 ** 2 // 5 + 8)' step by step using operator precedence. Understand why the output is 14.0 and explore detailed explanations for each calculation.

Python Programming

What will be the output of the following statement?

Statement:

print(6 + 5 / 4 ** 2 // 5 + 8)

Options:

  • (A) –14.0
  • (B) 14.0
  • (C) 14
  • (D) –14

Answer: (B) 14.0

Explanation:

To evaluate the given statement, we follow Python’s operator precedence, which determines the order in which operations are executed. The precedence rules are:

  1. Parentheses `()`: Highest precedence.
  2. Exponentiation `**`: Performed next.
  3. Division `/`, Floor Division `//`, Multiplication `*`, Modulo `%`: Left-to-right.
  4. Addition `+`, Subtraction `-`: Lowest precedence.

Let’s break the expression step by step:

6 + 5 / 4 ** 2 // 5 + 8

Step 1: Exponentiation (`**`)

Evaluate 4 ** 2 (4 raised to the power of 2):

4 ** 2 = 16

The expression becomes:

6 + 5 / 16 // 5 + 8

Step 2: Division (`/`)

Evaluate 5 / 16 (floating-point division):

5 / 16 = 0.3125

The expression becomes:

6 + 0.3125 // 5 + 8

Step 3: Floor Division (`//`)

Evaluate 0.3125 // 5 (floor division truncates the result to the nearest integer towards negative infinity):

0.3125 // 5 = 0.0

The expression becomes:

6 + 0.0 + 8

Step 4: Addition (`+`)

Finally, evaluate the additions:

6 + 0.0 = 6.0
6.0 + 8 = 14.0

Final Output:

The result of the expression is 14.0.

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