Python: I'm Making A Simple Calculator For Class. What's Wrong With This Code?

My teacher requests me to make a calculator that can calculate a 15% tip on a submitted price. I followed an online tutorial for this python application. I made a simple addition,

Solution 1:

because y is string

y = int(raw_input("Input second integer: "))

Solution 2:

I see a couple problems with your code.

Your use of print on the first line will give you troubles, because print is a function in Python 3. You should call it like print("hello").

On line 8, you have an extra colon:

calc():

Get rid of that.

Last, you don't need the semicolons when you call calc()

Solution 3:

This has a lot of changes to do. First, the first line of code should be:

print ("Hello")

Then, the raw_input() should become input().

Next, there should not be a colon or semicolon after calc() except on the second line when you are defining a function.

The code should look something like this. Try it.

print ("Hello")
defcalc():
    x = int(input("Input first integer: "))
    y = int(input("Input second integer: "))
    type = str.lower(input("(A)dd, (S)ubstract, (M)ultiply, (D)ivide \n"))
    iftype != "a"andtype != "s"andtype != "m"andtype != "d":
        print ("Sorry, the command you entered is not valid.")
        calc()
    else:
        iftype =="a":
            print ("The result is '" + str(x+y) + "'")
        eliftype == "s":
            print ("The result is '" + str(x-y) + "'")
        eliftype =="m":
            print ("The result is '" + str(x*y) + "'")
        eliftype == "d":
            print ("The result is '" + str(float(x)/float(y)) + "'")

        ifint(input("Enter 1 if you would like to perform another calculation? \n")) == 1:
            calc()
        else:
            exit()
calc()

Hope this helps.

Solution 4:

Instead of converting to int (thus flooring whatever your value is -- 2.99 becomes 2, for instance) converting to float should do the trick nicely; the tip calculation should work even if you're doing 2.0*0.15 instead of 2*0.15.

This will obviously only work when you know what input you can expect. It will fail pretty badly if someone enters anything that isn't valid.

Solution 5:

I figured it out. I was supposed to use:

int(float(input("Enter your meal price:")))

Thank you, everyone!