All pyramid triangle
public class alltriangle {
public static void main(String[] args) {
// bottom Left Corner Star Pattern
int n=4;
for(int i=1;i<=n;i++){
for(int j =1;j<=n;j++){
if(i-j>=0){
System.out.print("*");
}
}
System.out.println();
}
System.out.println();
// Top left corner star pattern
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(i+j<=n+1){
System.out.print("*");
}
}
System.out.println();
}
System.out.println();
// bottom right corner star pattern
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(i+j>=n+1){
System.out.print("*");
}
else{
System.out.print(" ");
}
}
System.out.println();
}
System.out.println();
// Top right corner star pattern
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(j-i>=0){
System.out.print("*");
}
else{
System.out.print(" ");
}
}
System.out.println();
}
}
}
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