Why doesn't the console always display the output of function execution?

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There are several reasons why the console may not always display the output of function execution:

1. The function may be designed to not return anything. In this case, there would be no output to display.

2. The function may be returning a value, but the code calling the function may not be doing anything with that value. In this case, the output is there, but it is not being displayed.

3. The function may contain a syntax error or logic error that prevents it from executing properly. In this case, the function may not produce any output at all, or the output may be incorrect.

4. The output may be being logged to a file or sent to another system, rather than being displayed in the console.