PL/SQL ACCEPT command: how does it work?

Why the user input is not stored into the variable?

[Quoted]
• file p.sql ------ [Quoted] variable x varchar2(20) accept x prompt 'x: ' print x

  ---

SQL> start p
x: 3

X

SQL>

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Cristian Veronesi ><(((( > http://www.crpa.it

Haste is of the devil, and tardiness from the All-Merciful
(oriental proverb)