js-coding-challenges

Challenge 5: Reverse a String

Write a function that takes a string as input and returns the string reversed. For example, if the input string is “hello”, the function should return “olleh”.

Answer

function reverseString(str) {
  // Split the string into an array of characters
  const chars = str.split("");

  // Reverse the array of characters
  const reversed = chars.reverse();

  // Join the array of characters back into a string
  const result = reversed.join("");

  // Return the reversed string
  return result;
}

Answer Explanation

The function takes a single argument, str, which is the string to be reversed. Here’s what the function does:

• First, it splits the input string into an array of individual characters using the split method with an empty string as the delimiter.
• Next, it uses the reverse method to reverse the order of the characters in the array.
• The function then uses the join method to join the array of characters back into a single string.
• Finally, the function returns the reversed string.

Here’s an example usage of the function:

console.log(reverseString("hello")); // 'olleh'
console.log(reverseString("racecar")); // 'racecar'

In this example, the function correctly reverses the input strings and returns the reversed strings “olleh” and “racecar”, respectively.

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