chore: import upstream snapshot with attribution

curriculum/challenges/english/blocks/basic-javascript/bd7123c9c549eddfaeb5bdef.md

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+---
+id: bd7123c9c549eddfaeb5bdef
+title: Use Bracket Notation to Find the First Character in a String
+challengeType: 1
+forumTopicId: 18341
+dashedName: use-bracket-notation-to-find-the-first-character-in-a-string
+---
+
+# --description--
+
+<dfn>Bracket notation</dfn> is a way to get a character at a specific index within a string.
+
+Most modern programming languages, like JavaScript, don't start counting at 1 like humans do. They start at 0. This is referred to as <dfn>Zero-based</dfn> indexing.
+
+For example, the character at index 0 in the word `Charles` is `C`. So if `const firstName = "Charles"`, you can get the value of the first letter of the string by using `firstName[0]`.
+
+Example:
+
+```js
+const firstName = "Charles";
+const firstLetter = firstName[0];
+```
+
+`firstLetter` would have a value of the string `C`.
+
+# --instructions--
+
+Use bracket notation to find the first character in the `lastName` variable and assign it to `firstLetterOfLastName`.
+
+**Hint:** Try looking at the example above if you get stuck.
+
+# --hints--
+
+The `firstLetterOfLastName` variable should have the value of `L`.
+
+```js
+assert(firstLetterOfLastName === 'L');
+```
+
+You should use bracket notation.
+
+```js
+assert(__helpers.removeJSComments(code).match(/firstLetterOfLastName\s*=\s*lastName\s*\[\s*\d\s*\]/));
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+// Setup
+let firstLetterOfLastName = "";
+const lastName = "Lovelace";
+
+// Only change code below this line
+firstLetterOfLastName = lastName; // Change this line
+```
+
+# --solutions--
+
+```js
+let firstLetterOfLastName = "";
+const lastName = "Lovelace";
+
+// Only change code below this line
+firstLetterOfLastName = lastName[0];
+```