How do you calculate your character’s Maximum Hit Points?

I am very new to tabletop games. I have recently started playing D&D 5th Edition with a good group of people and we have a great DM. I have also purchased the 5th edition Player’s Handbook. Half the fun of D&D is creating these amazing player characters. But for the life of me, I cannot seem to find anything on establishing a player character’s Maximum Hit Points. Can anyone tell me what figures or formulas are used to calculate maximum hit points?