What is the output of the following Python code?

def foo(x, y=3):
print(x+y)

foo(5)

Question

What is the output of the following Python code?

def foo(x, y=3):
    print(x+y)

foo(5)

BlackTom AI · Accepted Answer

First, I examine the function definition: def foo(x, y=3): print(x+y). Here, x is a required positional argument, and y has a default value of 3. When foo is called with a single argument, that argument is bound to x, and y takes its default value of 3.

Option 1: 'Python will report an error' — This is incorrect because the function foo is defined with a required x and an optional y with a default value. Calling foo(5) provides the required argument, so there is no error.

Option 2: '5' — This would be the result if the code printed just x, ignoring y or if y were somehow not added. However, the code prints the sum x+y, and since y defaults to 3, the printed value is not 5.

Option 3: '3' — This would correspond to printing only y or if x were missing, but in this call both values participate in the sum, so the result is not 3.

Option 4: '8' — This is the correct outcome. The function call foo(5) sets x = 5 and uses the default y = 3, so the expression x + y evaluates to 8, which is what gets printed.

In summary, the reasoning hinges on understanding default parameter values and how positional arguments bind when a default is provided. Since foo(5) supplies only x, y remains at its default of 3, yielding 5 + 3 = 8 when printed.

4510_COMP_SCI_X_0010 W03 Quiz

What is the output of the following Python code? def foo(x, y=3): print(x+y) foo(5)

View Explanation

Log in for full answers

Similar Questions

Question at position 23 What will be the output of the following code? A. "Hello, World" and "Hello, Alice" B. "Hello, name" and "Hello, Alice" C. "Hello, World" and TypeError D. "Hello, Alice" only BCADClear my selection

Question at position 25 What will be the output of the following code? A. "Hello, World" and "Hello, Alice" B. "Hello, name" and "Hello, Alice" C. "Hello, World" and TypeError D. "Hello, Alice" only ABDCClear my selection

Copy ofwhat value is assigned to cost?def calculate_total(price, tax=0.1): total = price + (price * tax) cost = calculate_total(20)

Consider the following function definition: def rectangle_area(length=2, width=3): """Return a rectangle's area.""" return length * width Which of the following statements is false?

What is the output of the following Python code? def foo(x=3, y): print(x+y) foo(5)

5. Which of the following function headers is correct? A. def f(a = 1, b): B. def f(a = 1, b, c = 2): C. def f(a = 1, b = 1, c = 2): D. def f(a = 1, b = 1, c = 2, d):

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler