Drupal 7 - How to programatically update field value

In general, we can use node_save to save a new node or alter the existing node and then save the changes. Since the topic here is about programmatically updating field value, let us look at an example rather going deep into node_save.

<?php
  $node = node_load($nid);
  $node->fieldname['und'][0]['value'] = 'field value';
  node_save($node);
?> 

suresh
Thu, 03/10/2016 - 12:00