Diamond of star
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class Main {
public static void main(String[] args) {
int n = 5; // controls height (half diamond)
// Upper part
for (int i = 1; i <= n; i++) {
// spaces
for (int j = 1; j <= n - i; j++) {
System.out.print(" ");
}
// stars
for (int j = 1; j <= 2*i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
// Lower part
for (int i = n - 1; i >= 1; i--) {
// spaces
for (int j = 1; j <= n - i; j++) {
System.out.print(" ");
}
// stars
for (int j = 1; j <= 2*i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
}
Java
INFO