Why does this code not return the false

[HollyBomb]

*/
function mutation(arr) {

  var a = arr[0].toLowerCase();

  var b = arr[1].toLowerCase().split("");

  var c = 0;

 for(var i = 0; i <= b.length; i++) {

   if(a.includes(b[i])){

     c++;

     return true;

   }

 } else return false;

}
*/

[JeremyLT]

Hello there.

Do you have a question?

If so, please edit your post to include it in the Tell us what’s happening section.

Learning to describe problems is an important part of learning how to code.

Also, the more information you give us, the more likely we are to be able to help.

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[HollyBomb]

Hi randall,

Thank you for the feedback, i have altered the issue with the ‘else’ statement and moved it one line up. Also I have deleted the variable c as i can see that it has no purpose. The code now passes all of the tests except from the first one and i am perplexed as to why if all the others are working fine.

The new code reads:

function mutation(arr) {
  var a = arr[0].toLowerCase();
  var b = arr[1].toLowerCase().split("");

 for(var i = 0; i <= b.length; i++) {
   if(a.includes(b[i])){
     return true;
   } else return false;
 } 
}
  
mutation(["hello", "hey"]);

[lasjorg]

Try logging a[i] and b[i] inside the loop at the top.

Summary

function mutation(arr) {
  var a = arr[0].toLowerCase();
  var b = arr[1].toLowerCase().split("");

 for(var i = 0; i <= b.length; i++) {
   console.log('a[i] ===', a[i])
   console.log('b[i] ===', b[i])
   if(a.includes(b[i])){
     return true;
   } else return false;
 } 
}

mutation(["hello", "hey"]);

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Edit: Also, please include the link to the challenge when asking for help:

freeCodeCamp.org