diff --git a/step00c_type_error/app.ts b/step00c_type_error/app.ts
index 0a850c7..5d98f75 100644
--- a/step00c_type_error/app.ts
+++ b/step00c_type_error/app.ts
@@ -1,3 +1,7 @@
-let message = "Hello World";
-console.loger(message);
-        
+// A type error in TypeScript occurs when a value is used in a way that is incompatible with its declared type.
+
+let myName: string = "unknown person"
+myName = 4 // Here, try to assign the number 4 to variable `myName`. Since `myName` is type string, TypeScript will throw a type error: Type 'number' is not assignable to type 'string'.
+
+console.log(myName);
+