Check if a large number is divisible by 3 or not | Function to find that number divisible by 3 or not ; Compute sum of digits ; Check if sum of digits is divisible by 3. ; Driver code
function check ( str ) { let n = str . length ; let digitSum = 0 ; for ( let i = 0 ; i < n ; i ++ ) digitSum += ( str [ i ] - ' ' ) ; return ( digitSum % 3 == 0 ) ; } let str = " " ; let x = check ( str ) ? " " : " " ; document . write ( x ) ;