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butterfly.java
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butterfly.java
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public class butterfly{
public static void butterfly_pattern(int n){
//for first half outer loop
for(int i = 1; i<=n ; i++){
//inner loop
for(int j = 1; j<=i ; j++){
//print star
System.out.print("*");
}
//for spaces
for(int j = 1; j<=2*(n-i); j++){
System.out.print(" ");
}
//for stars
for(int j = 1; j<=i;j++){
System.out.print("*");
}
System.out.println();
}
//for second half outer loop
for(int i=n;i>=1;i--){
//inner loop
for(int j=1;j<=i;j++){
//for star
System.out.print("*");
}
for(int j=1; j<=2*(n-i);j++){
//for spaces
System.out.print(" ");
}
for(int j=1;j<=i;j++){
//for stars
System.out.print("*");
}
System.out.println();
}
}
public static void main(String args[]){
butterfly_pattern(4);
}
}