Jumpped another car with my battery now can't get the nissan to turn over hearing a clicking noise is it the alternator or the battery

If your battery is over 5 years old, it's the battery. More than likely it is the battery. The alternator just charges the battery whenever the car is running.

I don't know if your car was running when you jumped the other car (your car should always be running to jump start another car).

If you told me that you were driving and all of a sudden the car died (because the battery ran out of juice, because it wasn't getting charged by the alternator), I would say the alternator is the culprit.

But if your car can't start from a standstill, and your battery is over 5 years old, I would replace the battery. 4-5 years is about the lifespan of a car battery imho (an alternator can't charge a battery past it's lifespan). many "maintenance-free" batteries have an "eye" which you can see on the top of the battery if the battery needs changing. Another possibility with it being summer is the battery being dried up (for which you can add distilled water, just be careful you don't splash battery acid into your eyes!). if your battery is 2-3 years old or less, I would just have the battery charged.

U have drained ur battery by helping someone, next time always keep vehicles engine running while giving boost and keep it running after the boost is given.