Knowee
Questions
Features
Study Tools

use a code snippet to demonstrate the difference between passing arguments by reference and passing arguments by value in a function

Question

use a code snippet to demonstrate the difference between passing arguments by reference and passing arguments by value in a function

🧐 Not the exact question you are looking for?Go ask a question

Solution

Sure, I'll use Python to demonstrate this. Python uses a mechanism, which is known as "Call-by-Object", sometimes also called "Call by Object Reference" or "Call by Sharing".

If you pass immutable arguments like integers, strings or tuples to a function, the passing acts like call-by-value. The object reference is passed to the function parameters. They can't change the original data because they work on the copied data.

If you pass mutable arguments like lists, they are also passed by object reference, but they can change the original data in the function. This is because they directly modify the original data.

Here is a code snippet to demonstrate this:

# Here is a function that tries to modify its arguments
def try_to_change(x, y):
    x = 20
    y.append(40)
    print("Inside function: ", x, y)

# Initialize variables
x = 10
y = [10, 20, 30]

print("Before function call: ", x, y)

# Call the function
try_to_change(x, y)

print("After function call: ", x, y)

In this code, x is an integer (which is immutable) and y is a list (which is mutable). When we call try_to_change, it tries to change x and y. However, after the function call, x is still 10, because an integer is immutable. On the other hand, y has been changed to [10, 20, 30, 40], because a list is mutable.

This problem has been solved

Similar Questions

The difference between pass-by-reference and pass-by-value is that modifications made to arguments passed in by reference in the called function have effect in the calling function, whereas modifications made to arguments passed in by value in the called function can not affect the calling function.

Can you explain the difference between pass-by-value and pass-by-reference in programming?

What happens to the actual arguments when using the call by value method?

Define a function that takes an argument. Call the function. Identify what code is the argument and what code is the parameter.

Explain the concept of pass by reference

1/2

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.