diff --git a/GPA Calculator/Program.cs b/GPA Calculator/Program.cs
index 9e6da76..36f59a2 100644
--- a/GPA Calculator/Program.cs	
+++ b/GPA Calculator/Program.cs	
@@ -23,6 +23,10 @@ namespace GPA_Calculator
                 {
                     GradesList = new List<Grade>();
                 }
+                else if (inputGrade == "undo" && GradesList.Count > 0)
+                {
+                    GradesList.RemoveAt(GradesList.Count - 1);
+                }
             }
         }