Pattern Programs Using Java

public class Pattern {
public static void main(String[] args) {
int i, j;
for (i = 1; i <= 4; i++) {
for (j = 1; j <= i; j++) {
if (j < i)
System.out.print(j+"*" );
else
System.out.print(j);
}
System.out.println("\n");
}
}
}

output
------
1
1*2
1*2*3
1*2*3*3






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import java.util.Scanner;

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

int m = 3, n = 3;
int a[][] = new int[m][n]; // Creating the array
int i, j;

Scanner s = new Scanner(System.in);
/* Inputting the array */
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print("Enter the elements: ");
a[i][j] = s.nextInt();
}
}

// initializing sum to zero
int sum = 0;
System.out.println("The Boundary Elements are:");
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
// condition for accessing boundary elements
if (i == 0 || j == 0 || i == m - 1 || j == n - 1) {
sum = sum + a[i][j];
System.out.print(a[i][j] + "\t");
}
else {
System.out.print(" \t");
}
}
System.out.println();
}
System.out.println(sum);
}
}


output
------
Input
123
456
789

output
123
4 6
789

sum:40