Java Code To Create Pyramid and Pattern
Example 1: Program to print half pyramid using *
public class Main {
public static void main(String[] args) {
int rows = 5;
for (int i = 1; i <= rows; ++i) {
for (int j = 1; j <= i; ++j) {
System.out.print("* ");
}
System.out.println();
}
}
}
Example 2: Program to print half pyramid a using numbers
public class Main {
public static void main(String[] args) {
int rows = 5;
for (int i = 1; i <= rows; ++i) {
for (int j = 1; j <= i; ++j) {
System.out.print(j + " ");
}
System.out.println();
}
}
}
Example 3: Program to print half pyramid using alphabets
public class Main {
public static void main(String[] args) {
char last = 'E', alphabet = 'A';
for (int i = 1; i <= (last - 'A' + 1); ++i) {
for (int j = 1; j <= i; ++j) {
System.out.print(alphabet + " ");
}
++alphabet;
System.out.println();
}
}
}
Example 4: Inverted half pyramid using *
public class Main {
public static void main(String[] args) {
int rows = 5;
for (int i = rows; i >= 1; --i) {
for (int j = 1; j <= i; ++j) {
System.out.print("* ");
}
System.out.println();
}
}
}
Example 5: Inverted half pyramid using numbers
public class Main {
public static void main(String[] args) {
int rows = 5;
for (int i = rows; i >= 1; --i) {
for (int j = 1; j <= i; ++j) {
System.out.print(j + " ");
}
System.out.println();
}
}
}
Example 6: Program to print full pyramid using *
public class Main {
public static void main(String[] args) {
int rows = 5, k = 0;
for (int i = 1; i <= rows; ++i, k = 0) {
for (int space = 1; space <= rows - i; ++space) {
System.out.print(" ");
}
while (k != 2 * i - 1) {
System.out.print("* ");
++k;
}
System.out.println();
}
}
}
Example 7: Program to print pyramid using numbers
public class Main {
public static void main(String[] args) {
int rows = 5, k = 0, count = 0, count1 = 0;
for (int i = 1; i <= rows; ++i) {
for (int space = 1; space <= rows - i; ++space) {
System.out.print(" ");
++count;
}
while (k != 2 * i - 1) {
if (count <= rows - 1) {
System.out.print((i + k) + " ");
++count;
} else {
++count1;
System.out.print((i + k - 2 * count1) + " ");
}
++k;
}
count1 = count = k = 0;
System.out.println();
}
}
}
Example 8: Inverted full pyramid using *
public class Main {
public static void main(String[] args) {
int rows = 5;
for(int i = rows; i >= 1; --i) {
for(int space = 1; space <= rows - i; ++space) {
System.out.print(" ");
}
for(int j=i; j <= 2 * i - 1; ++j) {
System.out.print("* ");
}
for(int j = 0; j < i - 1; ++j) {
System.out.print("* ");
}
System.out.println();
}
}
}
Example 9: Print Pascal's triangle
public class Main {
public static void main(String[] args) {
int rows = 6, coef = 1;
for(int i = 0; i < rows; i++) {
for(int space = 1; space < rows - i; ++space) {
System.out.print(" ");
}
for(int j = 0; j <= i; j++) {
if (j == 0 || i == 0)
coef = 1;
else
coef = coef * (i - j + 1) / j;
System.out.printf("%4d", coef);
}
System.out.println();
}
}
}
Example 10: Print Floyd's Triangle.
public class Main {
public static void main(String[] args) {
int rows = 4, number = 1;
for(int i = 1; i <= rows; i++) {
for(int j = 1; j <= i; j++) {
System.out.print(number + " ");
++number;
}
System.out.println();
}
}
}
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