What will be the output of below Java code?

Example Code: 

public Test
{
    public static void main(String[] args)
    {
        if(true)
            int a=10;
        
        System.out.println("Hello");
    }
}

Output:-Compile-time error: Variable declaration not allowed here.

If we are not using curly bracket then only one statement allows for if statement but that statement should not be declarative statement; In above example we are declaring int variable without curly bracket, this is not allowed because int a = 10 is a declarative statement. We can use any other statement except declarative statement.