Question

What is the output for the following code?
alpha = [21,32,12,1,2,7,55]
alpha.extend([42,4])
print(alpha)
(21,32,12,1,2,7,55]
[21,32,12,1,2,7,55,42,4]
(21,32.12.42,1,2,7,55]
None of these
Skype fe​

Answer 1

Answer:

[21,32,12,1,2,7,55,42,4]

Explanation:

.extend(extra) method of a iterable(like list,tuple) adds extra at the end of the iterable

So, each element of [42,4] gets added(appended) at the end of the list

Answer 2

The output for the following còde will be [21, 32, 12, 1, 2, 7, 55, 42, 4]

Extra Information

append() method in Python takes the argument and adds it as a single element at the end of the list.

extend() method in Python loops over the argument which helps us in adding each element in the list.

Example

a = [1, 2, 3, 4, 5]

b =  [6, 7, 8, 9]

Here our argument is b =  [6, 7, 8, 9]

A) a.append(b)

If this is used then the output will be

a = [1, 2, 3, 4, 5, [6, 7, 8, 9]]

B) a.extend(b)

If this is used then the output will be

a = [1, 2, 3, 4, 5, 6, 7, 8, 9]

Python is created by Guido van Rossum and came into existence in 1991. It is a high-level and general programming language. It is a very lucid programming language as it has a good language construct and object-oriented approach. It is dynamically typed and garbage-collected.