diff --git a/C++ & C/10.cpp b/C++ & C/10.cpp
index 41784dd6..25b133b4 100644
--- a/C++ & C/10.cpp	
+++ b/C++ & C/10.cpp	
@@ -1,15 +1,19 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
-const double pi=3.14;
-const char newline='\n';
-int main(){
- double r=5.0;
- double circle;
- circle=2*pi*r;
- cout<<circle;
- cout<<newline;
 
+int main()
+{
+    int firstNumber, secondNumber, sumOfTwoNumbers;
+    
+    cout << "Enter two integers: ";
+    cin >> firstNumber >> secondNumber;
 
+    // sum of two numbers in stored in variable sumOfTwoNumbers
+    sumOfTwoNumbers = firstNumber + secondNumber;
 
+    // Prints sum 
+    cout << firstNumber << " + " <<  secondNumber << " = " << sumOfTwoNumbers;     
 
+    return 0;
 }
+// For Hacktoberfest2021
diff --git a/Python/Bubble_Sort.py b/Python/Bubble_Sort.py
index 69d29848..1010fc19 100644
--- a/Python/Bubble_Sort.py
+++ b/Python/Bubble_Sort.py
@@ -1,20 +1,28 @@
 # bubble sorting an array
 #//---create a random list---//
+# Code is more optimal from previous version
+# Added comment from understanding the meaning 
 
-import random as rand
-a=[]
-for _ in range(10):
- x=rand.randint(0,100)
- a.append(x)
-print ("random : ",a)
+def bubbleSort(arr):
+	n = len(arr)
 
-#//---logic to swap pair of no.---//
+	# Traverse through all array elements
+	for i in range(n):
 
-for j in range (len(a)):
-    temp=a.copy()
-    for i in range(len(a)-1):
-        if a[i]>a[i+1]:
-            a[i],a[i+1]=a[i+1], a[i]
-    if temp==a:
-        break
-print("sorted : ",a)
+		# Last i elements are already in place
+		for j in range(0, n-i-1):
+
+			# traverse the array from 0 to n-i-1
+			# Swap if the element found is greater
+			# than the next element
+			if arr[j] > arr[j+1] :
+				arr[j], arr[j+1] = arr[j+1], arr[j]
+
+# Driver code to test above
+arr = [64, 34, 25, 12, 22, 11, 90]
+
+bubbleSort(arr)
+
+print ("Sorted array is:")
+for i in range(len(arr)):
+	print ("%d" %arr[i]),
diff --git a/java/Patterns/pattern1.java b/java/Patterns/pattern1.java
index 199bc9bc..df2595c1 100644
--- a/java/Patterns/pattern1.java
+++ b/java/Patterns/pattern1.java
@@ -3,13 +3,14 @@
 public class pattern1 {
     public static void main(String[] args) {
         Scanner sc = new Scanner(System.in);
-        int num = sc.nextInt();
-
-        for (int i = 1; i <= num; i++) {
-            for (int j = 1; j <= i; j++) {
-                System.out.print("*\t");
+        System.out.print("Enter a row Number: ");
+        int x = sc.nextInt();
+        for(int i=1;i<=x;i++){
+            for(int j=1;j<=i;j++){
+                System.out.print("*);
             }
-            System.out.println();
+                System.out.println();
         }
+        
     }
 }