[Example] X to 5

app/examples/x-to-5.recho.js

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+/**
+ * @title X to 5
+ * @author Bairui Su
+ * @created 2025-11-13
+ * @pull_request 193
+ * @github pearmini
+ * @thumbnail_start 23
+ */
+
+/**
+ * ============================================================================
+ * =                            X to 5                                        =
+ * ============================================================================
+ *
+ * This example demonstrates how to use `echo.key()` to track values across
+ * multiple iterations. When you use the same key for different values across
+ * iterations, they are displayed in a table format where each key becomes a row.
+ *
+ * This makes it easy to visualize how variables change over time in loops or
+ * iterative algorithms.
+ */
+
+//➜ +-------+---+---+----+
+//➜ | {x^1} | 0 | 1 |  2 |
+//➜ |-------|---|---|----|
+//➜ | {x^2} | 0 | 1 |  4 |
+//➜ |-------|---|---|----|
+//➜ | {x^3} | 0 | 1 |  8 |
+//➜ |-------|---|---|----|
+//➜ | {x^4} | 0 | 1 | 16 |
+//➜ |-------|---|---|----|
+//➜ | {x^5} | 0 | 1 | 32 |
+//➜ +-------+---+---+----+
+{
+  let x = 0;
+  while (x < 3) {
+    echo.key("x^1")(x ** 1);
+    echo.key("x^2")(x ** 2);
+    echo.key("x^3")(x ** 3);
+    echo.key("x^4")(x ** 4);
+    echo.key("x^5")(x ** 5);
+    x++;
+  }
+}