diff --git a/numerical_methods/ode_forward_euler.cpp b/numerical_methods/ode_forward_euler.cpp
index e289d96e7..12b1c959d 100644
--- a/numerical_methods/ode_forward_euler.cpp
+++ b/numerical_methods/ode_forward_euler.cpp
@@ -113,8 +113,8 @@ double forward_euler(double dx, double x0, double x_max,
     /* start integration */
     std::clock_t t1 = std::clock();
     double x = x0;
-    do  // iterate for each step of independent variable
-    {
+
+    do {  // iterate for each step of independent variable
         if (save_to_file && fp.is_open()) {
             // write to file
             fp << x << ",";
diff --git a/numerical_methods/ode_midpoint_euler.cpp b/numerical_methods/ode_midpoint_euler.cpp
index 4b7c47a88..4d1137b3e 100644
--- a/numerical_methods/ode_midpoint_euler.cpp
+++ b/numerical_methods/ode_midpoint_euler.cpp
@@ -121,8 +121,7 @@ double midpoint_euler(double dx, double x0, double x_max,
     /* start integration */
     std::clock_t t1 = std::clock();
     double x = x0;
-    do  // iterate for each step of independent variable
-    {
+    do {  // iterate for each step of independent variable
         if (save_to_file && fp.is_open()) {
             // write to file
             fp << x << ",";
diff --git a/numerical_methods/ode_semi_implicit_euler.cpp b/numerical_methods/ode_semi_implicit_euler.cpp
index 45be22530..0d57cbfb0 100644
--- a/numerical_methods/ode_semi_implicit_euler.cpp
+++ b/numerical_methods/ode_semi_implicit_euler.cpp
@@ -120,8 +120,7 @@ double semi_implicit_euler(double dx, double x0, double x_max,
     /* start integration */
     std::clock_t t1 = std::clock();
     double x = x0;
-    do  // iterate for each step of independent variable
-    {
+    do {  // iterate for each step of independent variable
         if (save_to_file && fp.is_open()) {
             // write to file
             fp << x << ",";