Pascal Triangle

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        //input number of lines
        int n = scanner.nextInt();
        //save the number of lines temporary
        int temp = n;
        //create array that will be printed
        int[] arr = new int[n];
        //that array will save the main one
        int[] arrTemp = new int[n];
        n = 0;

        while(n<=temp){
            //lets loop through the array
            for(int i = 0; i <n; i++){
                //if the number is in first or last place it is 1
                if(i == 0 || i == n-1){
                    arr[i] = 1;
                    //arrTemp[i] = 1;
                }
                //otherwise, the number would be the sum of the number above it and the number ot its left
                else{
                        arr[i] = arrTemp[i-1] + arrTemp[i];
                }
                // print the next line of numbers
                System.out.print(arr[i] + " ");
            }
            //now save the current line to the temp line, that would be useful when we want to
            //sum the numbers in the next line
            for(int i = 0; i <n; i++){
                arrTemp[i] = arr[i];
            }
            // count of numbers per line increases
            n++;
            //space the lines
            System.out.println();
        }
    }
}