2006 chevy cavalier will not start

Today my son’s car just would not start. The battery is okay, the fuses look okay but car won’t start. Up to now, it has run just fine. Any ideas?

When you say it does not start what happens when you turn the key. Is there silence? I there a clicking sound? Does the engine crank but not fire up? Depending on what is happening, this could be a dead battery, bad starter fuel problem or other … Tell us more about what is going on, the mileage, maintenance history etc.