The program does not run

Hello! I have a MacBook and a XCode installed ( latest version from App World for Mac ), but when I write a programm and click "Run", I have an empty window without the text. What's the problem. I tried more code examples.

It's a simple programm, that does calculate the sum of two numbers and display the result on the screen.
The code:
How can you see - there is no data in the console.

Similar Messages

Maybe you are looking for