HW2

import sys
def greet_user():
 """Display a simple greeting."""
 print("Hello Young Master!")
 print("My name is Cal!")

greet_user()



print("I can be used for making mathematical calculations.")
print("Now, How may I be of assistance?")

while True:
# input choice
    try:
        print()
        a=int(input("Enter First Number:"))
        b=int(input("Enter Second Nunber:"))

    except:
        print("Error")
        sys.exit(1)


    print()
    print("Calculator Operations")
    print("1.Add")
    print("2.Substract")
    print("3.Multiply")
    print("4.Divide")
    print("5. Exit Program")
    print()




    try:
        ch=int(input("Enter Choice(1-4): "))

    except:
        print("Error")
        sys.exit(1)




    if ch== 1:

        c=a+b
        print("Sum = ",c)
    elif ch==2:

        c=a-b
        print("Difference = ",c)
    elif  ch==3:

        c=a*b
        print("Product = ",c)
    elif ch==4:

        c=a/b
        print("Quotient = ",c)
    elif ch==5:
        #if ch==6:
        g=str(input("Continue?"))




    else: print("Invalid Choice")


else:
    Break