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JavaScript

Posted by Nas Jones
Nas Jones
7,849 Points

If else statement error

https://w.trhou.se/y161k1smru. This is a snapshot of my workspace i'm still not done with everything yet. For question four and answer four in the if else statement i have a logical or operator. Maybe i didn't do it right but whenever i finish the five questions i always get 4 out of 5 right instead of all five. The correct answer to question 4 is "24" but i wanted to also put "twenty four" as an option too. I don't know why i'm getting four out of five correct, i'm assuming it's the logical or operator done incorrectly.

2 Answers

Cameron Childres
Cameron Childres
11,820 Points
Cameron Childres
Cameron Childres
11,820 Points

Hi Nas,

You're very close! The logical operator is done just fine, the issue here is the string "twenty four":

fourthQuestion.toUpperCase() === "twenty four"

Here you're taking the input for fourthQuestion, converting it to upper case, and comparing it to a lower case string. An answer of "twenty four" is turned in to "TWENTY FOUR" and compared against "twenty four".

If you change "twenty four" to upper case your code should work as intended:

fourthQuestion.toUpperCase() === "TWENTY FOUR"
Nas Jones
Nas Jones
7,849 Points

Hey, thank you for the help i appreciate it. That worked and fixed it, just curious the solution you gave me I'm assuming it takes care of both lower case and upper case situations correct?. I know the ".toUpperCase()" converts it to upper case but I'm confused as to why i couldn't leave the string as "twenty four" doesn't it convert it to uppercase anyways?. I'm a little confused of the whole sequence when using ".toUpperCase()"

Cameron Childres
Cameron Childres
11,820 Points
Cameron Childres
Cameron Childres
11,820 Points

For sure! When you use a method like ".toUpperCase()" it only applies to what it's directly attached to. It won't have any affect on the string on the other side of the comparison operator:

fourthQuestion = "twenty four"
fourthQuestion.toUpperCase() === "twenty four"
// becomes "TWENTY FOUR" === "twenty four", false

In this set up the variable fourthQuestion will always be converted to uppercase before being checked. It's because of this we need the answer to be in uppercase to match:

fourthQuestion = "twenty four"
fourthQuestion.toUpperCase() === "TWENTY FOUR"
// becomes "TWENTY FOUR" === "TWENTY FOUR", true

No matter what mix of cases are given to fourthQuestion, they'll always be converted to uppercase before being checked:

fourthQuestion = "TwEnTy FoUr"
fourthQuestion.toUpperCase() === "TWENTY FOUR"
// becomes "TWENTY FOUR" === "TWENTY FOUR", true

Finally, if you wanted to leave the answer as "twenty four" you could instead use the ".toLowerCase()" method to ensure things match:

fourthQuestion = "TwEnTy FoUr"
fourthQuestion.toLowerCase() === "twenty four"
// becomes "twenty four" === "twenty four", true

It's worth remembering that "===" is a comparison operator and does not assign or change anything about the string on the right at all, it just checks if the left and right side match and returns either true or false.

I hope this helps to clear things up -- if you've got any questions ask away :)

Nas Jones
Nas Jones
7,849 Points
Nas Jones
Nas Jones
7,849 Points

I see, but would this be the best way to ensure that no matter what the user enters either lower or uppercase it will be correct?. Or is there a better way of making sure of that?.