[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
 }