* Check the battery. Make sure the battery has enough power to start the car. You can do this by checking the battery voltage with a voltmeter. The battery voltage should be around 12.6 volts. If the battery voltage is low, you may need to jump-start the car or replace the battery.
* Check the starter. The starter is responsible for turning the engine over. If the starter is not working, the engine will not start. You can check the starter by listening for a clicking sound when you turn the key. If you hear a clicking sound, the starter is working. If you don't hear a clicking sound, the starter may be bad.
* Check the ignition switch. The ignition switch is responsible for sending power to the starter. If the ignition switch is not working, the starter will not receive power and the engine will not start. You can check the ignition switch by turning the key to the "on" position. If the dashboard lights come on, the ignition switch is working. If the dashboard lights do not come on, the ignition switch may be bad.
If you are not sure how to check these things, you can take your car to a mechanic for diagnosis and repair.
