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$28$

print$("$invaild time

$($s$)")$

Assigr

Q$2$

$15$ Points

Write a program that validates a new PIN, following these rules:

The PIN must be $4$ digits long.

The digits of the PIN must be different.

C

Write a program that asks for a PIN. If the PIN does not satisfy the rules, prompt again.

Here is a sample run

Enter PIN $(4$ different digits$)$: $123$

Invalid, re$-$enter PIN $(4$ different digits$)$:$12345$

Invalid, re$-$enter PIN $(4$ different digits$)$:$1231$

Invalid, re$-$enter PIN $(4$ different digits$)$: $1234$

PIN is valid

Use only branching and loops$*********$