What is the output of this code?

Question

BlackTom AI · Accepted Answer

f-strings evaluate expressions inside { } and Python follows standard operator precedence (multiplication before addition), so the expression is computed before printing.

Relevant concepts:
- f-string: f"...{expr}..." evaluates expr and inserts its value into the resulting string.
- Operator precedence: * (multiplication) has higher precedence than + (addition).
- print: outputs the resulting string representation to standard output.

Step-by-step reasoning and calculations:
1. The expression inside the f-string is 5 + 3 * 2.
2. Apply operator precedence: evaluate the multiplication first:
   - 3 * 2 = 6
3. Now add the remaining term:
   - 5 + 6 = 11
4. The f-string substitutes this numeric result into the string, and print outputs: 11

Why the correct answer is correct:
- Because multiplication is performed before addition, the expression reduces to 5 + (3 * 2) = 5 + 6 = 11. The f-string simply formats that computed value into the string and print displays it.

Why the other options are incorrect (briefly):
- 10: would be the result of a different expression (for example, 5 + 3 + 2) but not 5 + 3 * 2.
- 8: equals 5 + 3, which would ignore the "* 2" entirely — not how Python evaluates the expression.
- Error: f-strings accept arithmetic expressions, so no runtime or syntax error occurs here.
- 13: not produced by any standard reordering of these operators; it does not match 5 + (3 * 2).
- 16: would be the result of (5 + 3) * 2, i.e., if parentheses changed the order; they are not present here.

Conclusion: The printed output is 11, which matches the provided correct answer "11".

What is the output of this code?单项选择题

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