diff --git a/README.md b/README.md
index 3e2bbcd..d322231 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,11 @@ To add a new entry, simply follow this syntax inside [ ]:
 
 ```json
 {
-    "name": "YOUR-FULLNAME",
-    "bio": "YOUR-BIO",
+    "name": "ADITYA PATHAK",
+    "bio": "PROGRAMMER",
     "github_url": [
-        "https://github.com/YOUR-GITHUB-USERNAME/"
+        "https://github.com/paditya99/"
     ],
-    "github_username": "YOUR-GITHUB-USERNAME"
+    "github_username": "paditya99"
 }
 ```
diff --git a/marix.cpp b/marix.cpp
new file mode 100644
index 0000000..5a7ad3f
--- /dev/null
+++ b/marix.cpp
@@ -0,0 +1,220 @@
+#include<iostream>
+using namespace std;
+void matrixrow_add(int a[100][100],int n,int m)
+{
+    cout<<"\n   ________________________________________________________________________________\n";
+    cout<<"\n";
+    cout<<"\n\n\t => THE ROW WISE SUM OF MATRIX : \n";
+    cout<<"\n";
+    int sum=0,sum2=0;
+   for(int i=0;i<n;i++)
+  {
+      cout<<"\t\t\t";
+     for(int j=0;j<m;j++)
+     {
+        cout<<a[i][j]<<"   ";
+        sum=sum+a[i][j];
+     }
+     cout<<"   =  "<<sum;
+     cout<<"\n\n";
+     sum=0;
+  }
+
+}
+void matrixcol_add(int a[100][100],int n,int m)
+{
+    cout<<"\n\t => THE COLUMN WISE SUM OF MATRIX : \n";
+    cout<<"\n";
+
+    int sum=0;
+   for(int i=0;i<m;i++)
+  {
+      cout<<"\t\t\t";
+     for(int j=0;j<n;j++)
+     {
+        cout<<a[j][i]<<"   ";
+        sum=sum+a[j][i];
+     }
+     cout<<"   =  "<<sum;
+     cout<<"\n\n";
+     sum=0;
+  }
+
+}
+void matrixdiag1_add(int a[100][100],int n,int m)
+{
+    cout<<"\n   ________________________________________________________________________________\n";
+    cout<<"\n";
+    int sum=0,sum2=0,flag,flagi;
+   for(int i=0;i<n;i++)
+  {
+
+     for(int j=0;j<m;j++)
+     {
+        if(i==j)
+        {
+            sum=sum+a[i][j];
+            flag=1;
+        }
+        if((i+j)==n-1)
+        {
+            sum2=sum2+a[i][j];
+            flagi=1;
+        }
+     }
+  }
+  if(n==m)
+  {
+    if(flag==1)
+      {
+        cout<<"\n\t => SUM OF THE MAJOR DIAGONAL OF MATRIX : "<<sum;
+      }
+     if(flagi==1)
+      {
+        cout<<"\n\t => SUM OF THE MINOR DIAGONAL OF MATRIX : "<<sum2;
+      }
+  }
+
+  else
+  {
+     cout<<"\n\t => !! ERROR !! No. of rows and columns are not same, so sum of diagonal cannot be calculated. \n";
+  }
+   cout<<"\n";
+
+}
+void matrixlowtri_add(int a[100][100],int n,int m)
+{
+    cout<<"\n   ________________________________________________________________________________\n";
+    cout<<"\n";
+
+    cout<<"\n\t => THE LOWER TRIANGULAR ELEMENTS OF MATRIX IS SHOWN BELOW : \n";
+    int sum=0;
+   for(int i=0;i<n;i++)
+  {
+      cout<<"\n\t\t\t";
+     for(int j=0;j<m;j++)
+     {
+        if(i>=j)
+        {
+            cout<<a[i][j]<<"   ";
+            sum=sum+a[i][j];
+        }
+        if(i<j)
+        {
+            cout<<"_"<<"   ";
+        }
+     }
+     cout<<"\n";
+  }
+  cout<<"\n\t => SUM OF LOWER TRIANGULAR ELEMENTS OF THE MATRIX IS : "<<sum;
+}
+void matrixupptri_add(int a[100][100],int n,int m)
+{
+    cout<<"\n\t => THE UPPER TRIANGULAR ELEMENTS OF MATRIX IS SHOWN BELOW : \n";
+    int sum=0;
+   for(int i=0;i<n;i++)
+  {
+      cout<<"\n\t\t\t";
+     for(int j=0;j<m;j++)
+     {
+        if(i<=j)
+        {
+            cout<<a[i][j]<<"   ";
+            sum=sum+a[i][j];
+        }
+        if(i>j)
+        {
+            cout<<"_"<<"   ";
+        }
+     }
+     cout<<"\n";
+  }
+  cout<<"\n\t => SUM OF UPPER TRIANGULAR ELEMENTS OF THE MATRIX IS : "<<sum;
+}
+void matrixtranspose(int a[100][100],int n,int m)
+{
+    cout<<"\n   ________________________________________________________________________________\n";
+    cout<<"\n";
+    cout<<"\n\t => TRANSPOSE OF THE MATRIX IS : \n";
+    cout<<"\n";
+   for(int i=0;i<m;i++)
+  {
+      cout<<"\t\t\t";
+     for(int j=0;j<n;j++)
+     {
+        cout<<a[j][i]<<"   ";
+     }
+     cout<<"\n\n";
+  }
+
+}
+int main()
+{
+  int a[100][100],i,j,sum=0,n,m,x;
+  cout<<"\n\t     ======================\n";
+  cout<<"  \t       MATRIX OPERATIONS\n";
+  cout<<"  \t     ======================\n";
+  cout<<"\n\n\t Enter the number of rows(n) : ";
+  cin>>n;
+  cout<<"\n\t Enter the number of columns(m) : ";
+  cin>>m;
+  cout<<"\n\n\t Enter the elements of the matrix : ";
+  for(i=0;i<n;i++)
+  {
+     for(j=0;j<m;j++)
+     {
+        cin>>a[i][j];
+     }
+  }
+  cout<<"\n\t THE MATRIX YOU ENTERED IS : \n";
+  for(i=0;i<n;i++)
+  {
+      cout<<"\n\t\t\t";
+     for(j=0;j<m;j++)
+     {
+        cout<<a[i][j]<<"   ";
+     }
+  }
+  cout<<"\n\n\t Enter the program you want to run : ";
+  cout<<"\n\n\t       1. ROW WISE & COLUMN WISE SUM OF A MATRIX \n";
+  cout<<"\t       2. SUM OF MAJOR & MINOR DIAGONAL OF A MATRIX\n";
+  cout<<"\t       3. LOWER TRIANGULAR & UPPER TRIANGULAR ELEMENTS OF MATRIX\n";
+  cout<<"\t       4. TRANSPOSE OF A MATRIX\n";
+  cin>>x;
+  switch(x)
+  {
+    case 1:
+     matrixrow_add(a,n,m);
+     matrixcol_add(a,n,m);
+     break;
+
+    case 2:
+     matrixdiag1_add(a,n,m);
+     break;
+
+    case 3:
+        if(n==m)
+        {
+          matrixlowtri_add(a,n,m);
+          matrixupptri_add(a,n,m);
+        }
+        else
+        {
+            cout<<"    ______________________________________________________________________\n";
+            cout<<"\n\n\t ERROR !! 'n' is not equal to 'm'. \n";
+        }
+
+
+     break;
+
+    case 4:
+      matrixtranspose(a,n,m);
+      break;
+
+    default:
+        cout<<"\n\t INVALID INPUT !! ENTER AGAIN : ";
+        break;
+
+    }
+
+}