SQL & PL/SQL :: Get Input From User?

I want to get input of employee name from user, then select salary of that user & display. I have written following code but system shows error.

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create or replace procedure test is

number1 NUMBER(10);
number2 NUMBER(2) := 17;
text1 VARCHAR(12) := 'HELO WORLD';
text2 DATE := SYSDATE;
text3 VARCHAR(5);

BEGIN
text3:='&text3';
select sal
into number1
from emp
where ename=text3;
dbms_output.put_line(text1||' today on '||text2||' salary of Mr.'||text3||' is='||number1);
end test;
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ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at "SCOTT.TEST", line 10
ORA-06512: at line 1