function num_of_digits(num) { let cnt = 1; num = Math.abs(num); num = Math.floor(num/10); while(num != 0){ cnt = cnt+1; num = Math.floor(num/10); } return cnt; }
function num_of_digits(num) { let cnt = 1; num = Math.abs(num); num = Math.floor(num/10); while(num != 0){ cnt = cnt+1; num = Math.floor(num/10); } return cnt; }