Is it bad using your iPhone 5 while its charging?

I got an iPhone 5 and I'm wondering if its bad if you use an idevice while its charging I've heard

Yes, it's true that using an iPhone while it's on its charger causes damage to its battery and to its battery life.
That is why the iPhone cord is so short.
It's more safe to use the iPhone off of the charger, or just leave it on the charger without using it.
Hope this helped.

No, it is not bad at all.
It just makes it take longer to charge since you're using it while its charging.
But other than that, no, it does NOT ruin it.

Apple even sells car chargers on their site so you can use GPS while your phone is plugged in while driving.

Yes! Don't use Mobile while charging it will damage your battery and even decreases battery life, for good bettery life use your Mobile until it discharged upto 15 to 10% and while charging let it be get fully charged.