Home How do I return a value of true if the letters 'a' and 'b' are exactly 3 places apart?

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How do I return a value of true if the letters 'a' and 'b' are exactly 3 places apart?

January 21, 2022

I’m trying to create a function that takes in a string and outputs a value of true if any of the ‘a’s in the string are exactly 3 places from the ‘b’s in the same string. If the ‘a’s and ‘b’s are not exactly 3 places from one another than return false.

Examples
Input: "after badly"
Output: false
Input: "Laura sobs"
Output: true

This is what I have so far but it doesn’t seem to be working. If anyone could take a look and show me where I’ve gone wrong that would be awesome.

function string(str) {    
    for (i = 0; i < str.length; i++) {
      if(str[i] === 'a' && str[i+3] === 'b'){
        return true;
      }
    }
    return false;
}
console.log(string('lane borrowed'))

>Solution :

You will only get the third element based on your code. Since i+3 get the third element from the i which should be two space apart not three space.

function string(str) {    
    for (i = 0; i < str.length; i++) {
      if(str[i] === 'a' && str[i+4] === 'b'){
        return true;
      }
    }
    return false;
}
console.log(string('lane borrowed'))