STEP 9: Time to call and build the subtract() function!

• In LOGIC, from drop elif unindented at the very BOTTOM of your code.
• Change the test variable from choice to operation and the test value from "yes" to "b".
• From drop Function Call inside the if block and change the function name to subtract().

Run the code and enter b in the popup. We need to more code inside subtract() to make things happen!

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