Q240- Reverse a string in 3 different ways (loop, recursion, and spread operator)

Here are 3 different ways to reverse a string in JavaScript — using loop, recursion, and spread operator.

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⭐ Q240 — Reverse a String in 3 Ways

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✅ 1. Using a Loop (for loop)

function reverseLoop(str) {
  let reversed = "";
  for (let i = str.length - 1; i >= 0; i--) {
    reversed += str[i];
  }
  return reversed;
}

console.log(reverseLoop("hello")); // "olleh"

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✅ 2. Using Recursion

function reverseRecursion(str) {
  if (str === "") return "";
  return reverseRecursion(str.slice(1)) + str[0];
}

console.log(reverseRecursion("hello")); // "olleh"

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✅ 3. Using Spread Operator + Array reverse()

function reverseSpread(str) {
  return [...str].reverse().join("");
}

console.log(reverseSpread("hello")); // "olleh"

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🎯 In Short

1. Loop → fastest and most manual
2. Recursion → elegant but slower
3. Spread operator → easiest one-liner