adding new also

insertionsort

@@ -0,0 +1,41 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+void printArray(int arr[], int n)
+{
+    int i;
+    for (i = 0; i < n; i++)
+        cout << arr[i] << " ";
+    cout << endl;
+}
+
+void insertionSort(int arr[], int n){
+    int i, key, j;
+    for (i = 1; i < n; i++)
+    {
+        key = arr[i];
+        j = i - 1;
+
+        /* Move elements of arr[0..i-1], that are
+        greater than key, to one position ahead
+        of their current position */
+        while (j >= 0 && arr[j] > key)
+        {
+            arr[j + 1] = arr[j];
+            j = j - 1;
+        }
+        arr[j + 1] = key;
+    }
+}
+
+/* Driver code */
+int main()
+{
+    int arr[] = { 12, 11, 13, 5, 6 };
+    int n = sizeof(arr) / sizeof(arr[0]);
+
+    insertionSort(arr, n);
+    printArray(arr, n);
+
+    return 0;
+}