Stephan Seitz
--- a/pystencils/backends/cbackend.py
+++ b/pystencils/backends/cbackend.py
            return res

+    def _print_Sum(self, expr):
+        template = jinja2.Template(
+            """[&]() {
+    {{dtype}} sum = ({{dtype}}) 0;
+    for ( {{iterator_dtype}} {{var}} = {{start}}; {{condition}}; {{var}} += {{increment}} ) {
+        sum += {{expr}};
+    }
+    return sum;
+}()""")
+        var = expr.limits[0][0]
+        start = expr.limits[0][1]
+        end = expr.limits[0][2]
+        code = template.render(
+            dtype='float',