No, Cristiano Ronaldo did not participate in this World Cup.

Cristiano Ronaldo is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. He is one of the best players in the world, often referred to as the best of all time.

The 2018 FIFA World Cup was held in Russia, and Portugal did not qualify for the tournament. Ronaldo was devastated but continued to show his support for the team and his country. He said, "I feel sorry for not being able to help my national team in the World Cup, but I wish them the best of luck and I'm sure they will make all Portuguese people proud."

Ronaldo has been a key figure in the Portugal team for many years, and his absence from the 2018 World Cup was a huge loss. Despite this, Ronaldo remains one of the most popular footballers in the world and is still playing at the top level for his club side. He recently won the 2018 Ballon d'Or, and is set to continue to be a major force in the world of football.

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