diff --git a/math/sqrt_double.cpp b/math/sqrt_double.cpp
index ee0c723ef..b8027258d 100644
--- a/math/sqrt_double.cpp
+++ b/math/sqrt_double.cpp
@@ -1,18 +1,29 @@
 #include <iostream>
 #include <cassert>
 
-/* Calculate the square root of any number in O(logn) time, with precision fixed */
+/* Calculate the square root of any 
+number in O(logn) time, 
+with precision fixed */
 
-double Sqrt(double x){
+double Sqrt(double x)
+{
     double l = 0, r = x;
-    //Epsilon is the precision. A great precision is between 1e-7 and 1e-12.
+    /* Epsilon is the precision. 
+    A great precision is 
+    between 1e-7 and 1e-12.
     double epsilon = 1e-12;
-    while(l <= r){
+    */
+    while( l <= r )
+    {
         double mid = (l + r) / 2;
-        if(mid * mid > x){
+        if( mid * mid > x )
+        {
             r = mid;
-        } else {
-            if(x - mid * mid < epsilon){
+        } 
+        else 
+        {
+            if( x - mid * mid < epsilon )
+            {
                 return mid;
             }
             l = mid;