$7\mathrm{.}33$ LAB: yes no validation

Instructions

Write a validation kop that will check that the user typed either 'yes". $"$no$",$ or just the letteryor n$.$ The answer can be uppercase.

kwercase, or any combination.

You are required to use a while kop. You may NOT use a "fake do while" loop with break.

Examples of valid input:

y Y yes Yes YES YEs YeS yES yEs yeS

n N no No NO nO oN

Examples of expected output:

Please enter yes or no: yes

You entered yes

Note that the answer gets converted to kwercase.

Please enter yes or no: No

You entered no

Note that $Y$ is treated as a yes.

Please enter yes or no: Y

You entered yes

Invalid input is rejected and the program keeps asking for walid input.

Please enter yes or no: banana

invalid input

Please enter yes or no: shoes

invalid input

Please enter yes or no: $2024$

invalid input

Please enter yes or no: Yea Yea is not Yes!

invalid input

Please enter yes or no: No

You entered no

Helpfol Hints

Look up the kwer$()$ function for strings.

The expression foo$[0]$ gives you the first character of the string foo.