What is static block in java? And can anyone explain the code written in description???

Question

public class Program
{
static int a=m();
static{
System.out.println("static block");
}
static int m()
{
System.out.println("from m");
return 20;
}
public static void main(String[] args) {
System.out.println("value :"+a);
System.out.println("done");
}
}

Answer 1

https://code.sololearn.com/cvyvIl8z6hyF/?ref=app