1. Write a fuction called 'fac' that takes an input of number N and output N!.Print the result as N! is result. For example, N = 5, N! = 5 * 4 * 3 * 2 * 1 = 120. Print '5! is 120' Make a plot for y =...

Write a fuction called 'fac' that takes an input of number N and output N!.Print the result as N! is result. For example, N = 5, N! = 5 * 4 * 3 * 2 * 1 = 120. Print '5! is 120'
Program
def fac(N):
fact = 1
if N < 0:
print("Factorial doesn't exist for negative numbers")
elif N == 0:
print("The factorial of 0 is 1")
else:
for i in range(1, N + 1):
fact = fact * i
print(" The factorial of " + str(N) + "is " + str(fact))
N = int(input("Enter a number"))
fac(N)
Output
>python fact.py
Enter a number4
The factorial of 4is 24
>python fact.py
Enter a number-8
Factorial doesn't exist for negative numbers
>python fact.py
Enter a number5
The factorial of 5is 120
Make a plot for y = log(x), x is between 1 and 100.
Program
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(1, 100)
y = np.log(x)
plt.plot(x,y)
plt.show()
Output
Write a function called "operate" that takes as input two numbers, and a string that can be either "add" or "multiply". The output should be either the sum or product of the two numbers, depending on the string entered.
Program
def Operate(a,b,c):
if c=="add":
sum = a + b
print("The sum of two numbers" + str(a) + "and" + str(b) + "is" +...