Question

Please use Python for both

Concatenate List Elements

Write a function called concat_list that accepts a list of strings as an argument and returns a string made up of all elements in the list concatenated together in order. For example, if the argument is ['one', 'two', 'three'], the return value would be 'onetwothree'.

Remove List Duplicates

Write a function called remove_duplicates that accepts a list and returns a list containing the same elements in the same order but with duplicates removed. For example, if the argument is [7, 4, 2, 7, 2, 2, 9, 4], the returned list would be [7, 4, 2, 9].

Answer 1

1).

Code Explanation:

• pass the list x with strings to the functionconcat_list()
• In the function initialize an empty string
• Run a for loop and add i to s which concates the each string in the list
• After coming out of loop return s
• Then print the result

Code:

def concat_list(x):
s = ""
for i in x:
s = s+i
return s

x = ['one', 'two', 'three']
res = concat_list(x)
print(res)

O/P:

onetwothree

Code screenshot:

O/P screenshot:

2).

Code Explanation:

• Pass the list x to the function remove_duplicates()
• In the function declare an empty list.
• Iterate through elements in list
• Use the condition if i not in temp then append the i to temp list
• After coming out of loop return the temp list
• Print the result

Code Explanation:

Code:

def remove_duplicates(x):
temp = []
for i in x:
if i not in temp:
temp.append(i)
return temp

x = [7,4,2,7,2,2,9,4]
res = remove_duplicates(x)
print(res)

O/P:

[7, 4, 2, 9]

Code screenshot:

O/P screenshot:

(If you still have any doubts regarding this answer please comment)