diff --git a/.vscode/settings.json b/.vscode/settings.json
index 0c83701..310750d 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,6 +1,78 @@
 {
     "files.associations": {
         "iostream": "cpp",
-        "ostream": "cpp"
+        "ostream": "cpp",
+        "any": "cpp",
+        "array": "cpp",
+        "atomic": "cpp",
+        "bit": "cpp",
+        "*.tcc": "cpp",
+        "bitset": "cpp",
+        "cctype": "cpp",
+        "cfenv": "cpp",
+        "charconv": "cpp",
+        "chrono": "cpp",
+        "cinttypes": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "codecvt": "cpp",
+        "complex": "cpp",
+        "condition_variable": "cpp",
+        "csetjmp": "cpp",
+        "csignal": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cstring": "cpp",
+        "ctime": "cpp",
+        "cuchar": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "forward_list": "cpp",
+        "list": "cpp",
+        "map": "cpp",
+        "set": "cpp",
+        "unordered_map": "cpp",
+        "unordered_set": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "optional": "cpp",
+        "random": "cpp",
+        "ratio": "cpp",
+        "regex": "cpp",
+        "string": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "fstream": "cpp",
+        "future": "cpp",
+        "initializer_list": "cpp",
+        "iomanip": "cpp",
+        "iosfwd": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "mutex": "cpp",
+        "new": "cpp",
+        "scoped_allocator": "cpp",
+        "shared_mutex": "cpp",
+        "sstream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "thread": "cpp",
+        "typeindex": "cpp",
+        "typeinfo": "cpp",
+        "valarray": "cpp",
+        "variant": "cpp"
     }
 }
\ No newline at end of file
diff --git a/Binary_to_Decimal.cpp b/Binary_to_Decimal.cpp
new file mode 100644
index 0000000..d489392
--- /dev/null
+++ b/Binary_to_Decimal.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+#include <math.h>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() 
+{
+   string str, str2;
+   int j = 0, sum =0, i=0;
+   cin >> str;
+   int len = str.length();
+   reverse(str.begin(), str.end());
+    while(j!=(len) && i!=len) { 
+        str2 = str[i]; 
+        stringstream convert(str2);
+        int x;
+        convert >> x;
+        sum = sum + (x*pow(2,j)); 
+        j++;
+        i++;
+   }
+   cout << sum;
+}
\ No newline at end of file
diff --git a/Binary_to_Decimal.exe b/Binary_to_Decimal.exe
new file mode 100644
index 0000000..a2855e4
Binary files /dev/null and b/Binary_to_Decimal.exe differ
diff --git a/Binary_to_Octal_other_Method.cpp b/Binary_to_Octal_other_Method.cpp
new file mode 100644
index 0000000..ccabd97
--- /dev/null
+++ b/Binary_to_Octal_other_Method.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+   int binary;
+   cin >> binary;
+   int i = 0, octal = 0, decimal = 0;
+    while(binary!=0){
+        decimal = decimal + ((binary%10)*pow(2, i));
+        i++;
+        binary = int(binary/10);
+    }
+    i = 1;
+    while(decimal!=0){
+        octal = octal + ((decimal%8)*i);
+        decimal = int(decimal/8);
+        i = i*10;
+    }
+    cout << octal;
+}
\ No newline at end of file
diff --git a/Binary_to_Octal_other_Method.exe b/Binary_to_Octal_other_Method.exe
new file mode 100644
index 0000000..dab1f63
Binary files /dev/null and b/Binary_to_Octal_other_Method.exe differ
diff --git a/Circumference_of_Circle.cpp b/Circumference_of_Circle.cpp
new file mode 100644
index 0000000..ce9a3b0
--- /dev/null
+++ b/Circumference_of_Circle.cpp
@@ -0,0 +1,11 @@
+#include <iostream>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() 
+{
+   float r, circumference;
+   cin >> r;
+   circumference = (2*3.14*r);
+   cout << fixed << setprecision(2) << circumference;
+}
\ No newline at end of file
diff --git a/Circumference_of_Circle.exe b/Circumference_of_Circle.exe
new file mode 100644
index 0000000..0f5c51d
Binary files /dev/null and b/Circumference_of_Circle.exe differ
diff --git a/Decimal_to_Octal.cpp b/Decimal_to_Octal.cpp
new file mode 100644
index 0000000..0c22dd7
--- /dev/null
+++ b/Decimal_to_Octal.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+   int decimal;
+   cin >> decimal;
+   int i, octal = 0;
+    i = 1;
+    while(decimal!=0){
+        octal = octal + ((decimal%8)*i);
+        decimal = int(decimal/8);
+        i = i*10;
+    }
+    cout << octal;
+}
\ No newline at end of file
diff --git a/Decimal_to_Octal.exe b/Decimal_to_Octal.exe
new file mode 100644
index 0000000..e9e2f20
Binary files /dev/null and b/Decimal_to_Octal.exe differ
diff --git a/Fibonacci_Series.cpp b/Fibonacci_Series.cpp
new file mode 100644
index 0000000..d965dd0
--- /dev/null
+++ b/Fibonacci_Series.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+using namespace std;
+
+int main() 
+{
+   int n, t1=0, t2=1, tn;
+   cin >> n;
+   for (int i=0; i<n; i++) {
+       if(i==0) {
+           tn = t1;
+       } else if(i==1) {
+           tn = t2;
+       } else {
+           tn = t1+t2;
+           t1 = t2;
+           t2 = tn;
+       }
+       cout << tn << " ";
+   }
+}
\ No newline at end of file
diff --git a/Fibonacci_Series.exe b/Fibonacci_Series.exe
new file mode 100644
index 0000000..a0b754c
Binary files /dev/null and b/Fibonacci_Series.exe differ
diff --git a/Greatest_Of_Three_Numbers.cpp b/Greatest_Of_Three_Numbers.cpp
new file mode 100644
index 0000000..d5452db
--- /dev/null
+++ b/Greatest_Of_Three_Numbers.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+using namespace std;
+
+int main() 
+{
+   int n1, n2, n3;
+   cin >> n1;
+   cin >> n2;
+   cin >> n3;
+   if(n1>=n2 && n1>=n3){
+       cout << n1;
+   } else if(n2>=n1 && n2>=n3) {
+       cout << n2;
+   } else{
+       cout << n3;
+   }
+}
\ No newline at end of file
diff --git a/Greatest_Of_Three_Numbers.exe b/Greatest_Of_Three_Numbers.exe
new file mode 100644
index 0000000..0abb4ed
Binary files /dev/null and b/Greatest_Of_Three_Numbers.exe differ
diff --git a/Length_of_String.exe b/Length_of_String.exe
index 008c51f..31fec27 100644
Binary files a/Length_of_String.exe and b/Length_of_String.exe differ
diff --git a/Nth_Fibonacci_Number.cpp b/Nth_Fibonacci_Number.cpp
new file mode 100644
index 0000000..1412f9c
--- /dev/null
+++ b/Nth_Fibonacci_Number.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+using namespace std;
+
+int main() 
+{
+   int n, t1=0, t2=1, tn;
+   cin >> n;
+   for (int i=0; i<n; i++) {
+       if(i==0) {
+           tn = t1;
+       } else if(i==1) {
+           tn = t2;
+       } else {
+           tn = t1+t2;
+           t1 = t2;
+           t2 = tn;
+       }
+   }
+   cout << tn << " ";
+}
\ No newline at end of file
diff --git a/Nth_Fibonacci_Number.exe b/Nth_Fibonacci_Number.exe
new file mode 100644
index 0000000..009d7bf
Binary files /dev/null and b/Nth_Fibonacci_Number.exe differ
diff --git a/Palindrome.cpp b/Palindrome.cpp
new file mode 100644
index 0000000..647a5c8
--- /dev/null
+++ b/Palindrome.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+using namespace std;
+
+bool palindrome(string str) {
+    int len = str.length();
+    int mid = len/2;
+    for (int i=0; i<mid; i++)
+        for (int j=len; j>mid; j--) 
+            if(str[i]==str[j])
+                return true;
+            return false;
+}
+
+int main() 
+{
+    std::string str;
+    std::getline(std::cin, str);
+    palindrome(str) ? cout << "Palindrome" : cout << "Not a Palindrome";
+}
\ No newline at end of file
diff --git a/Palindrome.exe b/Palindrome.exe
new file mode 100644
index 0000000..653e3ca
Binary files /dev/null and b/Palindrome.exe differ
diff --git a/Palindrome_Other_Method.cpp b/Palindrome_Other_Method.cpp
new file mode 100644
index 0000000..8c4c98b
--- /dev/null
+++ b/Palindrome_Other_Method.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+bool palindrome(string str1, string str2) {
+    if(str1 == str2)
+        return true;
+    return false;
+}
+
+int main() 
+{
+    std::string str1, str2;
+    std::getline(std::cin, str1);
+    str2 = str1;
+    reverse(str2.begin(), str2.end());
+    palindrome(str1, str2) ? cout << "Palindrome" : cout << "Not a Palindrome";
+}
\ No newline at end of file
diff --git a/Palindrome_Other_Method.exe b/Palindrome_Other_Method.exe
new file mode 100644
index 0000000..87b75ff
Binary files /dev/null and b/Palindrome_Other_Method.exe differ
diff --git a/Reverse_Number_other_Logic.cpp b/Reverse_Number_other_Logic.cpp
new file mode 100644
index 0000000..b399574
--- /dev/null
+++ b/Reverse_Number_other_Logic.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    int n, reverse = 0, remainder;
+    cin >> n;
+    while(n != 0)
+    {
+        remainder = n % 10;
+        reverse = (reverse*10) + remainder;
+        n = n / 10;
+    }
+    cout << reverse;
+}
\ No newline at end of file
diff --git a/Reverse_Number_other_Logic.exe b/Reverse_Number_other_Logic.exe
new file mode 100644
index 0000000..36452eb
Binary files /dev/null and b/Reverse_Number_other_Logic.exe differ
diff --git a/Reverse_the_given_Number.cpp b/Reverse_the_given_Number.cpp
new file mode 100644
index 0000000..323af77
--- /dev/null
+++ b/Reverse_the_given_Number.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() 
+{
+   string str, str2;
+   int i;
+   cin >> str;
+   int len = str.length();
+   reverse(str.begin(), str.end());  
+   if(str[0]=='0'){
+       for(int j=1; j<=len; j++){
+           cout << str[j];
+       }
+   } else {
+       cout << str;
+   }
+}
\ No newline at end of file
diff --git a/Reverse_the_given_Number.exe b/Reverse_the_given_Number.exe
new file mode 100644
index 0000000..6fbd357
Binary files /dev/null and b/Reverse_the_given_Number.exe differ
diff --git a/Roots_of_Quadratic_Equation.cpp b/Roots_of_Quadratic_Equation.cpp
new file mode 100644
index 0000000..1fbab39
--- /dev/null
+++ b/Roots_of_Quadratic_Equation.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+#include <math.h>
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() 
+{
+   int a, b, c;
+   float root1, root2, diff;
+   cin >> a;
+   cin >> b;
+   cin >> c;
+   diff = b*b-4*a*c;
+   root1 = (-b+sqrt(diff))/(2*a);
+   root2 = (-b-sqrt(diff))/(2*a);
+   cout << "root1 = " << fixed << setprecision(2) << root1 << "  " << "root2 = " << fixed << setprecision(2) << root2;
+}
\ No newline at end of file
diff --git a/Roots_of_Quadratic_Equation.exe b/Roots_of_Quadratic_Equation.exe
new file mode 100644
index 0000000..b082157
Binary files /dev/null and b/Roots_of_Quadratic_Equation.exe differ
diff --git a/Second_Greatest_of_Three_Numbers.cpp b/Second_Greatest_of_Three_Numbers.cpp
new file mode 100644
index 0000000..a95c5f3
--- /dev/null
+++ b/Second_Greatest_of_Three_Numbers.cpp
@@ -0,0 +1,21 @@
+#include <iostream>
+using namespace std;
+
+int main() 
+{
+   int n1, n2, n3;
+   cin >> n1;
+   cin >> n2;
+   cin >> n3;
+   if((n1>n2 && n1<n3) || (n1<n2 && n1>n3) || (n1==n2 && n1<n3)){
+       cout << n1;
+   } else if((n2>n1 && n2<n3) || (n2<=n1 && n2>n3) || (n1==n3 && n1>n2)) {
+       cout << n2;
+   } 
+   else if(n1==n2 && n1>n3) {
+       cout << n3;
+   } 
+   else{
+       cout << n3;
+   }
+}
\ No newline at end of file
diff --git a/Second_Greatest_of_Three_Numbers.exe b/Second_Greatest_of_Three_Numbers.exe
new file mode 100644
index 0000000..0bce336
Binary files /dev/null and b/Second_Greatest_of_Three_Numbers.exe differ
diff --git a/Simple_Interest.exe b/Simple_Interest.exe
index 9406ede..9e12b7b 100644
Binary files a/Simple_Interest.exe and b/Simple_Interest.exe differ
diff --git a/String_Palindrome.cpp b/String_Palindrome.cpp
new file mode 100644
index 0000000..e52c094
--- /dev/null
+++ b/String_Palindrome.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+#include <string>
+#include <bits/stdc++.h>
+using namespace std;
+
+bool palindrome(string str1, string str2) {
+    if(str1 == str2)
+        return true;
+    return false;
+}
+
+int main() 
+{
+    std::string str1, str2;
+    std::getline(std::cin, str1);
+    str2 = str1;
+    reverse(str2.begin(), str2.end());
+    palindrome(str1, str2) ? cout << str1 << " is a palindrome" : cout << str1 << " is not a palindrome";
+}
\ No newline at end of file
diff --git a/String_Palindrome.exe b/String_Palindrome.exe
new file mode 100644
index 0000000..9c788cf
Binary files /dev/null and b/String_Palindrome.exe differ
diff --git a/String_Reverse_using_Recursion.cpp b/String_Reverse_using_Recursion.cpp
new file mode 100644
index 0000000..0a9808c
--- /dev/null
+++ b/String_Reverse_using_Recursion.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+void reverse(string str)
+{
+    int len = str.length();
+    if(len==1)
+        cout<<str;
+    else
+    {
+        cout << str[len-1];
+        reverse(str.substr(0, len - 1));
+    }
+}
+
+int main()
+{
+    string str;
+    getline(cin, str);
+    reverse(str);   
+}
\ No newline at end of file
diff --git a/String_Reverse_using_Recursion.exe b/String_Reverse_using_Recursion.exe
new file mode 100644
index 0000000..dc572b2
Binary files /dev/null and b/String_Reverse_using_Recursion.exe differ