Part $1$: Creating a Python program

Scenario: This program expands the usability on Exercise $3$: If statements by allowing multiple inputs from the user for one run of the program instead of ending after only one input. Each time the user types a y for the reprompt, the user will be prompted to enter in the first $6$ hex values of the MAC address. If the user enters in n for the reprompt, the program will end. If the user enters in something other than one of these two values for the reprompt, the program will tell them it is invalid and reprompt them. The user should be able to keep entering in hex values until they type n for whether they want to repeat or should keep being reprompted for either a y or an n if they type something other than that for the repeat prompt.

Example $1$: Ability to enter multiple hex values

The user enters $00$:$00$:$0$C$.$ When the program asks if the user wants to enter another one, the user typed y$.$ The user then typed $00$:$00$:$17.$ When the program asked again, the user entered n and the program finished.

MAC Manufacturer Program

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Blank line

Enter the first $6$ hex values of the MAC address $($format as XX:XX:XX$)$: $00$:$00$:$0$C

For $00$:$00$:$0$C the MAC manufacturer is Cisco Systems, Inc.

Blank line

Repeat $($y$=$yes, n$=$no$)$: y

Blank line

Enter the first $6$ hex values of the MAC address $($format as XX:XX:XX$)$: $00$:$00$:$17$

For $00$:$00$:$17$ the MAC manufacturer is Oracle.

Blank line

Repeat $($y$=$yes, n$=$no$)$: n

Blank line

The program has ended.

Example $2$: Invalid repeat prompt.

The user enters f$.$ When the user is asked to repeat they typed d$.$ The program told them it wasn't a valid option and reprompted them. The user typed in nothing $($i$.$e$.$ they just hit enter$)$ and were reprompted. The user typed in y and then for the first $6$ hex values the user typed in $00.$ When reprompted, they typed in n and the program finished.

MAC Manufacturer Program

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blank line

Enter the first $6$ hex values of the MAC address $($format as XX:XX:XX$)$: f

For f the MAC manufacturer is Unknown.

blank line

Repeat $($y$=$yes, n$=$no$)$: d

blank line

Not a valid option. Repeat $($y$=$yes, n$=$no$)$:

Not a valid option. Repeat $($y$=$yes, n$=$no$)$: y

Enter the first $6$ hex values of the MAC address $($format as XX:XX:XX$)$: $00$

For $00$ the MAC manufacturer is Unknown.

blank line

Repeat $($y$=$yes, n$=$no$)$: n

blank line

The program has ended.