Calculator/Hw#2 Update at master · V0zz/Calculator · GitHub

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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=float(input("Enter the first number:"))
        b=float(input("Enter the second nunber:"))

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


    # print()
    # print("Calculator Operations")
    # print("+.Add")
    # print("-.Substract")
    # print("*.Multiply")
    # print("/.Divide")
    # print("**.Exponential")
    # print()

    try:
        ch=input("Enter the operation: ")

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

    if ch=="+":

        c=a+b
        print("Sum = ",c)


    elif ch=="-":

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

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

        c=a/b
        print("Quotient = ",c)
    elif ch == "**":

        c = a ** b
        print("Exponential = ", c)

    else: print("Invalid Choice")

    User = input("Do you wish to exit?")
    if User == "n":
        continue
    elif User == "y":
        break