What is difference between this two codes?

Question

I have write this 2 codes
1st code output is --No Output
And other
is error
https://code.sololearn.com/cggxUJsY9max/?ref=app
https://code.sololearn.com/cGIQhAfN1604/?ref=app
https://www.sololearn.com/discuss/1743056/?ref=app

Answer 1

Your first code doesn't produce output because the method printDate() is never called. The reason why the second code generates output (actually it doesn't, it just shows an error message because of the missing main() function) was already explained in the question you linked