No, Amílcar Cabral was never a president. He was a revolutionary and political leader who played a key role in the liberation of Guinea-Bissau and Cape Verde from Portuguese colonial rule. Cabral was assassinated in 1973 before Guinea-Bissau gained independence, and therefore, never had the chance to serve as president.
Unmasking Amílcar Cabral: Test Your Knowledge on the Revolutionary Guinea-Bissauan Politician