RightAngledTriangle

public class RightAngledTriangle 
{
public static void main(String args[])
{
 int i,j,n=5;
 for(i=1;i<=n;i++)
 {
 for(j=1;j<=i;j++)
 {
 System.out.print("*");
 }
 System.out.println(); 
 }
}
}

Another code

public class RightAngledTriangle 
{
public static void main(String args[])
{
 int i,j,n=5;
 for(i=n;i>=1;i++)
 {
 for(j=i;j<=n;j++)
 {
 System.out.print("*");
 }
 System.out.println(); 
 }
}
}

Output:
*
**
***
****
*****