Factorial
Write a function called "fact" which takes a single integer argument (say "n")
and returns the factorial of the number.
For example fact(3) -> 6
2
python
assert fact(0) == 1
assert fact(5) == 120
Simple function
Create a simple function called "sqr" which takes a single argument and
returns the square of the argument
For example sqr(3) -> 9.
1
python
import math
assert sqr(3) == 9
assert abs(sqr(math.sqrt(2)) - 2.0) < 1e-14