JAVA program for pattern 1

 import java.util.Scanner;

public class pattern1

{

public static void main(String args[])

{

int i,j;

Scanner sc=new Scanner(System.in);

System.out.println("Enter the number");

int n=sc.nextInt();

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

{

for(j=1;j<=i;j++)

System.out.print("*");

System.out.println();

}

}

}

OUTPUT

Enter a number 

6

*
**
***
****
*****
******