reverse number snippet added

snippets/reverseNumber.md

@@ -0,0 +1,22 @@
+---
+title: reverseNumber
+tags: number,array,beginner
+---
+
+Reverses a number.
+Use `Object.prototype.toString()` to convert number to a string.
+Use the split function `String.prototype.split()` to convert string to array and `Array.prototype.reverse()` to reverse the order of the characters in the string.
+Combine characters to get a string using `String.prototype.join('')`.
+Use the `parseInt()` to convert string to a number and use `Math.sign()` to preserve the signum value of the number.
+
+```js
+const reverseNumber = n => {
+  const reveresedNumber = n.toString().split('').reverse();
+  return parseInt(reveresedNumber) * Math.sign(n);
+}
+```
+
+```js
+reverseNumber(981); // 189
+reverseNumber(-500); // -5
+```