Write a Java Code To Create Pyramid and Pattern

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Write a Java Code To Create Pyramid and Pattern

PROGRAM: Java Code To Create Pyramid and Pattern

/* Java Code To Create Pyramid and Pattern*/

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();
    }
  }
}

 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();
    }
  }
}

 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();
    }
  }
}

 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();
    }
  }
}

 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();
    }
  }
}

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();
    }
  }
}

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();
    }
  }
}

 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();
    }
  }
}

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();
    }
  }
}

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();
    }
  }
}