Question

Write a java program that will print out the following pattern 1 12 123 1234 12345

Answer 1

Answer:

public class Main {

  public static void main(String[] args)

{

  int n,m;

  int k=5;

  for(n=1;n<=k;n++)

  {

for(m=1;m<=n;m++)

  System.out.print(m);

   System.out.print(" ");

   }

}

}

Explanation:

The solution to this problem is the use of nested loops of an inner and outer loop to generate a half pyramid of numbers, but displayed on the same line so we have a sequence 1 12 123 1234 12345. The outer loop iterates for n=1 to n<=5 and the inner loop that has the print statement prints the integers from for m = 1 to m<=n.

Note that the value k = 5 is hard coded which in some sense is the number of rows, that is the length of iteration of the outer loop.