Check a large number is divisible by 16 or not | Function to find that number divisible by 16 or not ; Empty string ; If there is double digit ; If there is triple digit ; If number formed by last four digits is divisible by 16. ; Driver code
function check ( str ) { let n = str . length ; if ( n == 0 && n == 1 ) return false ; if ( n == 2 ) return ( ( ( str [ n - 2 ] - ' ' ) * 10 + ( str [ n - 1 ] - ' ' ) ) % 16 == 0 ) ; if ( n == 3 ) return ( ( ( str [ n - 3 ] - ' ' ) * 100 + ( str [ n - 2 ] - ' ' ) * 10 + ( str [ n - 1 ] - ' ' ) ) % 16 == 0 ) ; let last = str [ n - 1 ] - ' ' ; let second_last = str [ n - 2 ] - ' ' ; let third_last = str [ n - 3 ] - ' ' ; let fourth_last = str [ n - 4 ] - ' ' ; return ( ( fourth_last * 1000 + third_last * 100 + second_last * 10 + last ) % 16 == 0 ) ; } let str = " " ; if ( check ( str ) ) document . write ( " " ) ; else document . write ( " " ) ;