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como fazer map em javascript

// Exemplo 1
const apresentacao = ['Ilan', 'Daniela'];
// ['Ilan', 'Daniela']
apresentacao.map(nome => `Olá, ${nome}. Bem-vind@ :)`);
// ["Olá, Ilan. Bem-vind@ :)", "Olá, Daniela. Bem-vind@ :)"]

// Exemplo 2
const apresentacao = [2, 4, 6, 8];
// [2, 4, 6, 8]
apresentacao.map(num => `${num}^2 = ${num**2}`)
(5) ["2^2 = 4", "4^2 = 16", "6^2 = 36", "8^2 = 64"]

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