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javascript/snippets/range-generator.md

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+---
+title: Range generator
+type: snippet
+tags: [function,generator]
+author: chalarangelo
+cover: dark-leaves-6
+dateModified: 2020-10-11T17:05:55+03:00
+---
+
+Creates a generator, that generates all values in the given range using the given step.
+
+- Use a `while` loop to iterate from `start` to `end`, using `yield` to return each value and then incrementing by `step`.
+- Omit the third argument, `step`, to use a default value of `1`.
+
+```js
+const rangeGenerator = function* (start, end, step = 1) {
+  let i = start;
+  while (i < end) {
+    yield i;
+    i += step;
+  }
+};
+```
+
+```js
+for (let i of rangeGenerator(6, 10)) console.log(i);
+// Logs 6, 7, 8, 9
+```