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need help adding OR, a binary logical calculator with operations AND, OR, NOT.

need help adding OR, a binary logical calculator with operations AND, OR, NOT.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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need help adding OR, a binary logical calculator with operations AND, OR, NOT. 

def add(num1,num2):
return num1 + num2

def sub(num1,num2):
return num1 - num2

def mult(num1,num2):
return num1 * num2

def divide(num1,num2):
return num1 / num2

print("Select operation.")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")

option = int(input("Choose between 1,2,3,4: "))

a = int(input("First number: "))

b = int(input("Second number: "))

if option == 1:
print(a, " + " ,b, " = ", add(a,b))

elif option == 2:
print(a, " - ",b," = ",sub(a,b))

elif option == 3:
print(a, " * ",b," = ",mult(a,b))

elif option == 4:
print(a, " / ",b," = ",divide(a,b))
else:
print("error")

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