10 lines
240 B
JavaScript
10 lines
240 B
JavaScript
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function power_of_2(n) {
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if (typeof n !== 'number')
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return 'Not a number';
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return n && (n & (n - 1)) === 0;
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}
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console.log(power_of_2(16));
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console.log(power_of_2(18));
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console.log(power_of_2(256));
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