Python Data Structures and Algorithms - Recursion: Sum of a list of numbers
Python Recursion: Exercise-1 with Solution
Write a Python program to calculate the sum of a list of numbers.
Sample Solution:
Python Code:
def list_sum(num_List):
if len(num_List) == 1:
return num_List[0]
else:
return num_List[0] + list_sum(num_List[1:])
print(list_sum([2, 4, 5, 6, 7]))
Sample Output:
24
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Python: Tips of the Day
Maps the values of a list to a dictionary using a function, where the key-value pairs consist of the original value as the key and the result of the function as the value:
Example:
def tips_map_dictionary(itr, fn):
ret = {}
for a in itr:
ret[a] = fn(a)
return ret
print(tips_map_dictionary([2,4,6], lambda a: a * a))
Output:
{2: 4, 4: 16, 6: 36}
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