Blocage sur Hello World en c

Good evening everyone, please I can’t solve the Hello World exercise with the if statement and the function call doesn’t work. Could you tell me how to solve it?

Did you watch the video? Jeremy explains how to solve this exercise.

If you did and the problem still persists, please post what you have done so far.
Did you write some code? Please post it (in a code block).
Does your code fail to compile? Please post the error message.
Do the tests fail? Please post the test result (in a code block).