「繰り返し」の節の演習問題1の別解を削除 (#935)

Author: chvmvd

docs/1-trial-session/10-loop/_samples/product-alt/index.html

@@ -1,5 +1,5 @@
 let product = 1;
-for (let i = 1; i <= 10; i = i + 1) {
-  product = product * i;
+for (let i = 1; i <= 10; i += 1) {
+  product *= i;
 }
 document.write(product);

docs/1-trial-session/10-loop/_samples/product-alt/script.js

@@ -141,20 +141,6 @@ const string2 = `10から2を引くと${10 - 2}です。`;
 
 <Answer title="10の階乗">
 
-```javascript
-let product = 1;
-for (let i = 1; i <= 10; i = i + 1) {
-  product = product * i;
-}
-document.write(product);
-```
-
-<ViewSource url={import.meta.url} path="_samples/product" />
-
-別解
-
-複合代入演算子を使うと次のようにも書けます。
-
 ```javascript
 let product = 1;
 for (let i = 1; i <= 10; i += 1) {
@@ -163,7 +149,7 @@ for (let i = 1; i <= 10; i += 1) {
 document.write(product);
 ```
 
-<ViewSource url={import.meta.url} path="_samples/product-alt" />
+<ViewSource url={import.meta.url} path="_samples/product" />
 
 </Answer>