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4ekalov

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  1. var a = +prompt('Введите число'); Проверяем: var a = +prompt('Введите число'); // 33 console.log(a); // 33 . console.log(typeof a); // Number . console.log(Number.isInteger(a)); // True . var a = +prompt('Введите число'); // 5de console.log(a); // NaN . console.log(typeof a); // Number . console.log(Number.isInteger(a)); // False .
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