1998 Toyota Camry ignition

Other Category problem
1998 Toyota Camry Engine Size unknown Front Wheel Drive Automatic 175, 00 miles

My son's 1998 Toyota Camry was working fine. He parked the car, ran into a store and when he came out and attempted to start the car, it wouldn't work. The key goes into the ignition switch and only turns far enough to enable the radio to turn on but it won't turn far enough to let the car start.