diff --git a/c-basic/double.c b/c-basic/double.c
new file mode 100644
index 0000000..d9c7dea
--- /dev/null
+++ b/c-basic/double.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main()
+{
+  float f;
+  double d;
+
+  printf("float :");
+  scanf("%f", &f);
+
+  printf("double :");
+  scanf("%lf", &d);
+
+  printf("f = %f, d = %f", f, d);
+
+  return 0;
+}