﻿ Python Data Structures and Algorithms - Recursion: Factorial of a non-negative integer - w3resource

# Python Data Structures and Algorithms - Recursion: Factorial of a non-negative integer

## Python Recursion: Exercise-4 with Solution

Write a Python program to get the factorial of a non-negative integer.

Sample Solution:

Python Code:

``````def factorial(n):
if n <= 1:
return 1
else:
return n * (factorial(n - 1))

print(factorial(5))
```
```

Sample Output:

```120
```

Flowchart:

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Python Code Editor:

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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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