[pull] master from TheAlgorithms:master

Hashes/SHA256.js

@@ -59,14 +59,14 @@ function chunkify(str, size) {
 }
 
 /**
- * Rotates string representation of bits to th left
+ * Rotates string representation of bits to the right
  *
  * @param {string} bits - string representation of bits
  * @param {int} turns - number of rotations to make
  * @return {string} - string representation of bits after rotation
  *
  * @example
- *      rotateLeft("1011", 3); // "1101"
+ *      rotateRight("1011", 3); // "1101"
  */
 function rotateRight(bits, turns) {
   return bits.substr(bits.length - turns) + bits.substr(0, bits.length - turns)

Project-Euler/Problem006.js

@@ -1,11 +1,8 @@
 // https://projecteuler.net/problem=6
 
 export const squareDifference = (num = 100) => {
-  let sumOfSquares = 0
-  let sums = 0
-  for (let i = 1; i <= num; i++) {
-    sumOfSquares += i ** 2 // add squares to the sum of squares
-    sums += i // add number to sum to square later
-  }
+  let sumOfSquares = (num)*(num+1)*(2*num+1)/6
+  let sums = (num*(num+1))/2
+
   return sums ** 2 - sumOfSquares // difference of square of the total sum and sum of squares
 }