Print out a Diamond : For Loop « Statement Control « Java Tutorial





class Diamond {
  public static void main(String[] args) {
    for (int i = 1; i < 10; i += 2) {
      for (int j = 0; j < 9 - i / 2; j++)
        System.out.print(" ");

      for (int j = 0; j < i; j++)
        System.out.print("*");

      System.out.print("\n");
    }

    for (int i = 7; i > 0; i -= 2) {
      for (int j = 0; j < 9 - i / 2; j++)
        System.out.print(" ");

      for (int j = 0; j < i; j++)
        System.out.print("*");

      System.out.print("\n");
    }
  }
}
/*
         *
        ***
       *****
      *******
     *********
      *******
       *****
        ***
         *
*/










4.6.For Loop
4.6.1.The for Statement
4.6.2.For statement in detail
4.6.3.A loop allows you to execute a statement or block of statements repeatedly
4.6.4.The numerical for loop
4.6.5.Infinite For loop Example
4.6.6.initialization_expression: define two variables in for loop
4.6.7.Declare multiple variables in for loop
4.6.8.Multiple expressions in for loops
4.6.9.To omit any or all of the elements in 'for' loop: but you must include the semicolons
4.6.10.Keeping the middle element only in for loop
4.6.11.Using the Floating-Point Values as the control value in a for loop
4.6.12.Nested for Loop
4.6.13.Java's 'labeled for' loop
4.6.14.Print out a Diamond