Ceilingprblm.java

public class Ceilingprblm {
    //ceiling it's mean thet smallest element in array greater than = target;
    public static void main(String[] args) {
        int arr[]={2,3,5,9,14,16,18};
        int target=10;
        int ans=ceiling(arr,target);
        System.out.println("the ceiling of the number is : " +ans);
    }
        static int ceiling(int arr[],int target){
            int start=0;
            int end=arr.length-1;
            while(start<=end){
                int mid=start+(end-start)/2;
                if(target<=arr[mid]){
                    end=mid-1;

                }
                else if(target>=arr[mid]){
                    start=mid+1;
                }
                else{
                    return mid;
                }
            }
            return start;
        }
}