public class rectangle {
public static void main(String args[]) {
int n = 6;
int m = 5;
// 1. Question Solid Rectangle
// *****
// *****
// *****
// *****
// *****
// *****
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
System.out.print("*");
}
System.out.println();
}
System.out.println();
// 2. Question Hollow Rectangle
// *****
// * *
// * *
// * *
// * *
// *****
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (i == 1 || j == 1 || i == n || j == m) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
System.out.println();
// 3. Question Half Pyramid
// *
// **
// ***
// ****
// *****
// ******
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
System.out.print("*");
}
System.out.println();
}
// System.out.println();
System.out.println();
// 4. Question inverted half pyramid
// ******
// *****
// ****
// ***
// **
// *
for (int i = n; i >= 1; i--) {
for (int j = 1; j <= i; j++) {
System.out.print("*");
}
System.out.println();
}
System.out.println();
// 5. Question 180 degree inverted pyramid
// *
// **
// ***
// ****
// *****
// ******
for (int i = 1; i <= n; i++) {
// This for loop for printing spaces
for (int k = 1; k <= n - i; k++) {
System.out.print(" ");
}
// This for loop for printing star
for (int j = 1; j <= i; j++) {
System.out.print("*");
}
System.out.println();
}
System.out.println();
// 6. Question half Pyramid with Numbewrs
// 1
// 12
// 123
// 1234
// 12345
// 123456
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(j);
}
System.out.println();
}
System.out.println();
// 7. Question Inverted half Pyramid with Numbewrs
// 123456
// 12345
// 1234
// 123
// 12
// 1
for (int i = n; i >= 1; i--) {
for (int j = 1; j <= i; j++) {
System.out.print(j);
}
System.out.println();
}
System.out.println();
// 8. Question Floyed's Triangle
// 1
// 2 3
// 4 5 6
// 7 8 9 10
// 11 12 13 14 15
// 16 17 18 19 20 21
int number = 1;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(number + " ");
number++;
}
System.out.println();
}
System.out.println();
// 9. Question 0 1 Triangle
// 1
// 0 1
// 1 0 1
// 0 1 0 1
// 1 0 1 0 1
// 0 1 0 1 0 1
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
int sum = i + j;
if ((sum) % 2 == 0) {
System.out.print("1 ");
} else {
System.out.print("0 ");
}
}
System.out.println();
}
}
}
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