SWIMMING WAS INCLUDED in the first modern Olympic games in 1896 and diving events were added in 1904.Swimming is both an individual and a team sport and races takes place over a predetermined distance in one of the four major categories of stroke -free style,butterfly,breaststroke,and backstroke. Competition pools are clearly marked for racing and anti turbulence lane lines are used to separate the swimmers and help keep the water calm.The first team or individual to finish the race is the winner. Competitive diving is divided into men's and women's spring-board and platform (high board) events.There are six official groups of dives-forward dive,backward dive,arm stand dive,twist dive,reverse dive,and inward dives.competitors performs a set numbers of dives and after each one a panel of judges awards marks accordi