Today’s little music theory: Treble Clef. The definition of a treble clef is a symbol that is placed on every line of music to show the notes which will be sung or played by voices and instruments that can achieve higher notes
So playing violin you will see the Treble Clef, not the Bass Clef. Here is a demonstration of the Treble Clef.
Treble Clef is also known a G Clef.
The treble clef is also called the “G clef” because the symbol at the beginning of the staff (a stylized letter “G“) encircles the second line of the staff, indicating that line to be G4 (or g above middle C). (dictionary.onmusic.org)