diff --git a/sum.cpp b/sum.cpp
new file mode 100644
index 0000000..ae59281
--- /dev/null
+++ b/sum.cpp
@@ -0,0 +1,23 @@
+#include <iostream>
+using namespace std;
+
+int sum(int a, int b) {
+    if (a > b) { 
+        return 0;
+    }
+    return a + sum(a + 1, b);
+}
+
+int main() {
+    setlocale(0, "");
+    int a;
+    int b;
+    cout << "Введiть a: ";
+    cin >> a;
+    cout << "Введiть b: ";
+    cin >> b;
+
+    cout << "Сума чисел вiд " << a << " до " << b << " = " << sum(a, b) << endl;
+
+    return 0;
+}
\ No newline at end of file