function AdditivePersistence(num) { var sum, loop = 0; var val1 = num.toString(10).split("").map(function(t){return parseInt(t)}); while (val1.length > 1) { sum = 0; val1.forEach( function(number) { sum = sum + number; }); val1 = sum.toString(10).split("").map(function(t){return parseInt(t)}); loop++; } return loop; }
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