guessing numbers from 1 to 8
<p>My program needs to guess the user's number (from 1 to 8) by only asking 3 questions. It prints the first two questions correctly but then when I press enter for the third question, it just prints the last input I did.
How to make all inputs (yes or no) lower case? </p>

<pre><code># Simple Expert System
#firstQuestion = prstr(firstQuestion.lower()) 

print("Think of a number between 1 and 8.")

firstQuestion = (raw_input("Is it an even number? "))
secondQuestion = "Is it less than or equal to 4? "
thirdQuestion = "Is it less than or equal to 3? "
fourthQuestion = "Is it less than 3? "
fifthQuestion = "Is it greater than 6? "
sixthQuestion = "Is it greater than 5? "
seventhQuestion = "Is it less than 2? "




if firstQuestion == "yes":
    print(raw_input(secondQuestion))
elif firstQuestion == "no":
    print(raw_input(thirdQuestion))
elif secondQuestion == "yes":
    print(raw_input(fourthQuestion))
elif secondQuestion == "no":
    print(raw_input(fifthQuestion))
elif thirdQuestion == "no":
    print(raw_input(sixthQuestion))
elif thirdQuestion == "yes":
    print(raw_input(seventhQuestion))

elif fourthQuestion == "yes":
    print("Your number is 2")
elif fourthQuestion == "no":
    print("Your number is 4")

elif fifthQuestion == "yes":
    print("Your number is 8")
elif fifthQuestion == "no":
    print("Your number is 6")   

elif sixthQuestion == "yes":
    print("Your number is 7")
elif sixthQuestion == "no":
    print("Your number is 5")       

elif seventhQuestion == "yes":
    print("Your number is 1")
elif seventhQuestion == "no":
    print("Your number is 3")   
</code></pre>

<p>Can you provide the input you used?</p>

<p>It isn't needed though, as I think improving the structure of this program would help answer your question.</p>

<p>For instance, notice how you write:</p>

<pre><code>firstQuestion = (raw_input("Is it an even number? "))
secondQuestion = "Is it less than or equal to 4? "
</code></pre>

<p>Since you assigned the "raw_input..." to "firstQuestion", "firstQuestion" no longer holds the question but the answer to the question. There is a lack of consistency between these lines. It would make more sense to do something like:</p>

<pre><code>firstQuestion = "Is it an even number? "
secondQuestion = "Is it less than or equal to 4? "
#put your other questions here

firstAnswer = raw_input(firstQuestion)
if firstAnswer == "yes":
...
</code></pre>

<p>By changing your program in a way such as this, the logic and resulting behavior will be more clear.</p>

python python-2.7 python-3.x if-statement