diff --git a/insertion.c b/insertion.c
new file mode 100644
index 0000000..4616f40
--- /dev/null
+++ b/insertion.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+int* sort(int arr[], int size) {
+    for (int i = 1; i < size; i++) {
+        int s = i;
+        int key = arr[i];
+        while (s > 0) {
+            if (key < arr[s - 1]) {
+                arr[s] = arr[s - 1];
+            } else {
+                break;
+            }
+            s--;
+        }
+        arr[s] = key;
+    }
+    return arr;
+}
+
+void print(int arr[], int size) {
+    for (int i = 0; i < size; i++) {
+        printf("%d ", arr[i]);
+    }
+    printf("\n");
+}
+
+int main() {
+
+    int size = 10;
+    //sorted: 0,2,3,4,5,7,8,8,9,9
+    int arr[] = {9,8,7,5,3,9,8,2,4,0};
+
+    print(sort(arr, size), size);
+
+    return 0;
+}