diff --git a/C++/Program_24/HexaDecimal-Decimal.cpp b/C++/Program_24/HexaDecimal-Decimal.cpp
new file mode 100644
index 00000000..7a2f0a5e
--- /dev/null
+++ b/C++/Program_24/HexaDecimal-Decimal.cpp
@@ -0,0 +1,25 @@
+#include<bits/stdc++.h>
+using namespace std;
+int convert(string n){
+    int sum=0,s;
+    int x=1;
+    s = n.size();
+        for (int i = s-1; i >=0; i--)
+        {
+            if(n[i]>='0'&&n[i]<='9'){
+                sum += x*(n[i]-'0');
+            }
+            else if(n[i]>='A'&&n[i]<='F'){
+                sum += x* (n[i]-'A'+ 10);
+            }
+            x *= 16;
+        }
+        return sum;
+}
+int main(){
+    string n;
+    cin>>n;
+    int d=convert(n);
+    cout<<d;
+    return 0;
+}
diff --git a/C++/Program_24/README.md b/C++/Program_24/README.md
new file mode 100644
index 00000000..0034d8d1
--- /dev/null
+++ b/C++/Program_24/README.md
@@ -0,0 +1 @@
+Program to convert HexaDecimal number to Decimal Number.
\ No newline at end of file
diff --git a/C++/README.md b/C++/README.md
index c1e467b8..922575d5 100644
--- a/C++/README.md
+++ b/C++/README.md
@@ -13,3 +13,4 @@
 | Program-10 | Program to find the missing number in  a Sorted Array.
 | Program-15 | Program to find modular exponentiation.
 | Program-19| To check whether a number is in palindrome or not
+| Program-24 | Program to convert Hexa-Decimal number to Decimal number