How do you become level 100 in RuneScape?

well getting to combat lvl 100 in runescape is pretty hard. getting attack,defence strength and hp all to level 80 should get you to 100.also do range mage and prayer theyl get your combat level up but not very fast. sumoning is a quick and easy way to get you to level 100 but you have to be a member to do this skill and is can be expensive. I SUGGEST looking on youtube. you actually play for your whole life and then you reach 100