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CBSE Class 11 Computer Science Question 20 of 37

Lists in Python — Question 20

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20
Question

Question 15

Write a program to read a list of n integers and find their median.

Note: The median value of a list of values is the middle one when they are arranged in order. If there are two middle values, then take their average.

Hint: Use an inbuilt function to sort the list.

Solution
n = int(input("Enter number of elements in the list: "))
nums = []

print("Enter the elements of the list:")
for i in range(n):
    n1 = int(input("Enter element: "))
    nums.append(n1)
    
nums.sort()
n = len(nums)

if n % 2 == 0:
    mid1 = nums[n // 2 - 1]
    mid2 = nums[n // 2]
    median = (mid1 + mid2) / 2
else:
    median = nums[n // 2]

print("Median of the list is:", median)
Output
Enter number of elements in the list: 6
Enter the elements of the list:
Enter element: 10
Enter element: 20
Enter element: 4
Enter element: 45
Enter element: 99
Enter element: 30
Median of the list is: 25.0


Enter number of elements in the list: 5
Enter the elements of the list:
Enter element: 3
Enter element: 7
Enter element: 9
Enter element: 5
Enter element: 11
Median of the list is: 7
Answer

n
=
int
(
input
(
"Enter number of elements in the list: "
))
nums
=
[]
print
(
"Enter the elements of the list:"
)
for
i
in
range
(
n
):
n1
=
int
(
input
(
"Enter element: "
))
nums
.
append
(
n1
)
nums
.
sort
()
n
=
len
(
nums
)
if
n
%
2
==
0
:
mid1
=
nums
[
n
//
2
-
1
]
mid2
=
nums
[
n
//
2
]
median
=
(
mid1
+
mid2
)
/
2
else
:
median
=
nums
[
n
//
2
]
print
(
"Median of the list is:"
,
median
)
Output
Enter number of elements in the list: 6
Enter the elements of the list:
Enter element: 10
Enter element: 20
Enter element: 4
Enter element: 45
Enter element: 99
Enter element: 30
Median of the list is: 25.0


Enter number of elements in the list: 5
Enter the elements of the list:
Enter element: 3
Enter element: 7
Enter element: 9
Enter element: 5
Enter element: 11
Median of the list is: 7