Do not see label

Questions
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1

Program does not see the label when I use goto. Please help me in this situation.
Help please fix it ! I would be very grateful .

2

That works

In[2]:= Clear[a, b, c, d];
b = 1; a = 30;
{
 If[b <= 2, Goto[10], Goto[20]];
 Goto[20];
 Label[10];
 a = 10;
 Print["a = " , a];
 Goto[30];
 Label[20];
 a = 20;
 Print["a = ", a];
 Label[30];
 Print["the end"]
}

During evaluation of In[2]:= a = 10
During evaluation of In[2]:= the end
Out[4]= {Null}

Do you see the difference? Hint: CompoundExpression and Goto.