Interview Question 13 | Javascript Pro |
The given code defines a function `changeVowel` that takes a string as input and returns a modified string where all the vowels in the original string are replaced with their next letter. The function iterates over each character in the input string and checks if it is a vowel by comparing it with the elements in the `vowels` array. If a vowel is found, its character code is incremented by 1 using `str.charCodeAt(i) + 1`, and the next character is obtained using `String.fromCharCode()`. The modified character is then appended to the `newString` variable. If the character is not a vowel, it is directly appended to `newString`. Finally, the modified string is returned from the function. The code initializes `str` as "Javascript is Awesome." and prints the result of calling the `changeVowel` function with `str` using `console.log()`. The expected output is "Jbvbscrjpt js Bwfspmf."