This symbol is a half note.
It lasts for two counts.
There are only two half notes in one bar of * time.
A black box sitting on the middle line of the staff is
called a half rest.
It means two counts of silence.
This song is four bars long. It contains half notes, using the notes C, D and E as well as a half rest.
This song mixes half and quarter notes. It ends with three counts of silence (a half note rest plus a quarter note rest).
Traditional French
This song is eight bars long. Each bar has been numbered.