moving out outdated js docs

olddocs/js/if.md

@@ -0,0 +1,101 @@
+# If
+
+Run code based on a condition.
+
+### @parent js/language
+ 
+
+Conditionally run code depending on whether a [Boolean](/reference/types/boolean) condition is true or false.
+
+### Block Editor
+
+![](/static/mb/hourofcode-0.png)
+
+In the Block Editor, click on the dark blue gear icon (see above) to add an *else* or *if* to the current block.
+
+### Touch Develop
+
+### ~hide
+
+```
+let condition = true
+```
+
+### ~
+
+```
+if (condition) {
+    // this code runs if `condition` is `true`
+} else {
+    // this code runs if `condition` is `false`
+}
+```
+
+### Example: adjusting screen brightness
+
+If the screen [brightness](/reference/led/brightness) is `< 100`, this code sets the brightness to `255`:
+
+```
+if (led.brightness() < 100) {
+    led.setBrightness(255)
+}
+```
+
+You can leave the `then` or `else` blocks empty if they aren't needed.
+
+### Else if: multiple if statements
+
+You can chain together if statements by using `else if`. Like this:
+
+### ~hide
+
+```
+let otherCondition = true
+```
+
+### ~
+
+```
+if (condition) {
+    // this code runs if `condition` is `true`
+} else if (otherCondition) {
+    // this code runs if `other condition` is `true`
+}
+else {
+    // this code runs if neither `condition` or `other condition` are `true`
+}
+```
+
+### Example: compass heading
+
+The following example gets the [compass heading](/reference/input/compass-heading) and then uses ``if-then-else`` statements to display a letter on the screen (N for north, E for East, S for South, and W for West).
+
+```
+while (true) {
+    let degrees = input.compassHeading()
+    if (degrees < 45) {
+        basic.showString("N", 100)
+    } else if (degrees < 135) {
+        basic.showString("E", 100)
+    }
+    else if (degrees < 225) {
+        basic.showString("S", 100)
+    }
+    else {
+        basic.showString("W", 100)
+    }
+}
+```
+
+### Drag and drop
+
+You can move an entire ``if`` block by clicking the ``if`` keyword and dragging and dropping.
+
+### Lessons
+
+[love meter](/lessons/love-meter), [zoomer](/lessons/zoomer), [offset image](/lessons/offset-image)
+
+### See also
+
+[while loop](/js/while), [for](/reference/loops/for), [boolean](/reference/types/boolean)
+