31 lines
469 B
HTML
31 lines
469 B
HTML
<!DOCTYPE html>
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<html>
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<head lang="en">
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script>
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function f (n) {
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var base = n-1;
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if (n > 1)
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return n * base * f( n - 2);
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else
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return 1;
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}
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value = prompt("Inserire numero tra 1 e 15");
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if ( value && !isNaN(value) && value>=1 && value<=15 )
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document.writeln(f(value));
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else
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alert("Error");
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</script>
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</body>
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</html> |