pattern alphabets
import java.util.*;
public class p15 {
public static void main(String[] args) {
char ch='A';
System.out.println("enter n:");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
for(int i=1;i<=n;i++){
for(int j=1;j<=i;j++){
System.out.print(ch);
ch++;
}
System.out.println();
}
}
}
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