The FIFA World Cup is an international association football competition contested by the men's national teams of the members of Federation Internationale de Football Association (FIFA), the sport's global governing body. The championship has been contested every four years since the first tournament in 1930, except in 1942 and 1946, due to World War II. The Wales national football team has entered every World Cup since the 1950 tournament, but to date has only qualified for one World Cup, in 1958. On that occasion, they reached the quarter-finals before being eliminated by eventual winners Brazil.

Can we conclude that did wales ever qualify for the world cup?
yes