Update Jump Keyword

Jump-Keyword.md

@@ -9,3 +9,18 @@ Time Complexity:
 The `jump` keyword allows you to modify the order in which commands are executed by jumping directly to a certain line of the program.
 
 ## Example usage
+```grnd
+jump %end # jump to @end
+println "Hello!" # this appends 'Hello\n' to stdout
+@end
+```
+This program immediately jumps to @end, completely skipping the `println "Hello!"` statement. As a result, this program does nothing to stdout.
+
+We can also jump backwards and make an infinite loop.
+
+```grnd
+@loop
+    # ...
+    jump %loop
+```
+This program will run the code inserted at `# ...`, then jump back to the start of the loop. This makes the code inserted at `# ...` be repeated forever.