Sprint 1 errors: explain 0.js syntax error

Author: Richiealx

Sprint-1/2-mandatory-errors/answers.md

@@ -0,0 +1,29 @@
+# Sprint 1 — Mandatory Errors (Explanations)
+
+## 0.js
+- Error shown:
+- Why it happens:
+- MDN link (optional):
+- Error shown: `SyntaxError: Unexpected identifier 'is'` on line 1.
+- Why it happens: The file begins with plain English text that is not inside a comment or a quoted string. Node tries to interpret it as JavaScript code, but `This is ...` is not valid JS syntax, so parsing fails.
+- MDN link (optional): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Unexpected_token
+
+## 1.js
+- Error shown:
+- Why it happens:
+- MDN link (optional):
+
+## 2.js
+- Error shown:
+- Why it happens:
+- MDN link (optional):
+
+## 3.js
+- Error shown:
+- Why it happens:
+- MDN link (optional):
+
+## 4.js
+- Error shown:
+- Why it happens:
+- MDN link (optional):