CODEWITHSUNDEEP
javafor-loop
Klord
Klord

Reputation: 5

How do you print X number of characters in X number of lines?

This is a question I got in an assignment of my Java class.

Q: Write a java program to print the following output using single System.out.print(“*”)

stars

I achieved above using a single printline command.

class Example{
   public static void main(String[] args) {
      String star = "*";
      for (int a=0; a<5; a++) {
         System.out.println(star);
         star = star + " *";
      }
   }
}

But my proffesor wants to strictly follow the instructions in the question, hence can only use a single System.out.print(“*”). Thanks in advance.

Upvotes: 0

Views: 423

Answers (2)

YJR
YJR

Reputation: 1202

class Example{
   public static void main(String[] args) {
      for (int a=0; a<6; a++) {
          for (int b=0; b<a; b++) {
                    System.out.print("* ");
          }
          System.out.print("\n");
      }
   }
}

You can do this without using println but you have to use print("\n") instead to indicate line break.

Upvotes: 1

Melron
Melron

Reputation: 579

You can use the print method instead of println but you have somehow to add an escape sequence (\n). In case that you can't add the new line character at the same print, you can use one of the following examples:

Using 2 for loops:

for (int i = 1; i <= 5; ++i) {
    for (int j = 1; j <= i; ++j)
        System.out.print("* ");

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

Using 1 for loop with the String#repeat as a helper:

for (int i = 1; i <= 5; i++) {
    System.out.print("* ".repeat(i));
    System.out.print("\n");
}

And the last one, using IntStream with the repeat as above (which i don't recommend it)

IntStream.rangeClosed(1, 5).forEach(c -> {
    System.out.print("* ".repeat(c));
    System.out.print("\n");
});

Upvotes: 0

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