Jumping a car, also known as jump-starting, is a simple process that allows you to start your car when the battery is dead or too weak to turn on the engine. Here is a step-by-step guide on how to jump-start a car:

1. Gather the necessary materials: You will need a set of jumper cables, another car with a good battery, and safety equipment such as gloves and eye protection.

2. Position the cars: Park the car with the good battery close to the car with the dead battery, making sure that the cars do not touch each other.

3. Turn off the engines: Turn off the engines of both cars to avoid any electrical accidents.

4. Connect the jumper cables: Connect one end of the red cable to the positive terminal of the good battery, and the other end to the positive terminal of the dead battery. Then, connect one end of the black cable to the negative terminal of the good battery and the other end to an unpainted metal surface on the car with the dead battery.

5. Start the engine: Start the car with the good battery and let it run for a few minutes. Then, try starting the car with the dead battery. If the engine starts, let it run for at least 15 minutes to allow the battery to charge.

6. Disconnect the cables: Once the car with the dead battery is running, carefully disconnect the jumper cables in the reverse order of how you connected them. First, disconnect the negative cable, then the positive cable.

It is important to note that jump-starting a car is a temporary solution and the battery should be checked and possibly replaced by a professional. Additionally, always use caution when jump-starting a car, and never jump-start a car with a damaged battery, as it can be dangerous.