class Star {
public static String printStar(int n) {
int i= 0;
int j= 0;
String starSequence = "";
for(i=0;i<n;i++) {
for(j=0;j<i+1;j++) {
starSequence += "*";
}
starSequence += "\n";
}
for(i=0;i<n-1;i++) {
for(j=(n-(i+1));j>0;j--) {
starSequence += "*";
}
starSequence += "\n";
}
return starSequence;
}
public static void main(String star[]) {
System.out.println(printStar(Integer.parseInt(star[0])));
}
}
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