Tabela Verdade && (E Lógico). Imaginemos que a decisão lógica que criamos, seja se temos mais de uma maçã E se as maçãs são verdes. Se tivermos duas maçãs, mas uma dela for vermelha, decisão retornará falso.

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true and false respectively. var a1 = true; var a2 = false; Se hela listan på developer.mozilla.org boolean型への変換 Boolean関数で文字列型からboolean型へ変換. JavaScriptの文字列 を boolean型 へBoolean関数で変換してみます。. ただし、注意が必要なのですが、Boolean関数は、 "true"をtrue、"false"をfalse には変換しません。 In JavaScript, booleans are the primitive data types that can either be true or false. For example, const a = true; const b = false; Note: If you wrap true or false in a quote, then they are considered as a string. For example, const a = 'true'; console.log(typeof a); // string JavaScript - The Boolean Object - The Boolean object represents two values, either true or false. If value parameter is omitted or is 0, -0, null, false, NaN, undefined, or the empty string Code language: JavaScript (javascript) How the script works.

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