Update the webpage

JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com

03.API-EXAMPLE.md

@@ -561,6 +561,50 @@ Value of x is 12
 Value of x is 17
 ```
 
+## Step 8. Changing the seed of pseudorandom generated numbers
+
+If you want to change the seed of `Math.random()` generated numbers, you have to initialize the seed value with `srand`.
+A recommended method is using `jerry_port_get_current_time()` or something based on a constantly changing value, therefore every run produces truly random numbers.
+
+[doctest]: # ()
+
+```c
+#include <string.h>
+#include <stdlib.h>
+#include "jerryscript.h"
+#include "jerryscript-port.h"
+#include "jerryscript-ext/handler.h"
+
+int
+main (void)
+{
+  /* Initialize srand value */
+  srand ((unsigned) jerry_port_get_current_time ());
+
+  /* Generate a random number, and print it */
+  const jerry_char_t script[] = "var a = Math.random (); print(a)";
+  size_t script_size = strlen ((const char *) script);
+
+  /* Initialize the engine */
+  jerry_init (JERRY_INIT_EMPTY);
+
+  /* Register the print function */
+  jerryx_handler_register_global ((const jerry_char_t *) "print",
+                                  jerryx_handler_print);
+
+  /* Evaluate the script */
+  jerry_value_t eval_ret = jerry_eval (script, script_size, false);
+
+  /* Free the JavaScript value returned by eval */
+  jerry_release_value (eval_ret);
+
+  /* Cleanup the engine */
+  jerry_cleanup ();
+
+  return 0;
+}
+```
+
 ## Further steps
 
 For further API description, please visit [API Reference page](https://jerryscript-project.github.io/jerryscript/api-reference/) on [JerryScript home page](https://jerryscript-project.github.io/jerryscript/).