..:: Source code - 01var_identifier.js ::..

/**
 * Variable identifier
 *  - can use any letter, digit, underscore (_) or dollar sign ($)
 *  - must start with _ , $ or letter
 *  - can't start with number
 */

//Good identifiers
var _name = 'John';
var firstName = 'Mary';
var $name = "Dollar";
var secondName2 = 'Smith';


//Bad identifiers
//var 5name = 'John'; //SyntaxError: identifier starts immediately after numeric literal
 

..:: NodeJS Console - 01var_identifier.js ::..

$ node 01var_identifier.js

		
		
$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.5 1305060 82572 ?       Ssl   2025 596:39 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 72804 ?       Ssl   2025 432:21 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.7 11855732 120952 ?     Ssl   2025 1001:02 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11815724 99264 ?      Ssl   2025 681:19 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 84568 ?       Ssl   2025 932:17 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.4  0.4 1304920 73336 ?       Ssl   2025 440:04 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297772 67384 ?       Ssl   2025 431:37 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.1  2.8 12155872 466892 ?     Ssl   2025 4528:47 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.6  1.2 11893204 198392 ?     Ssl   2025 2879:42 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.3 1099656 65444 ?       Ssl   2025  48:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.3 1099520 65400 ?       Ssl   2025  48:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1099524 64652 ?       Ssl   2025  48:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100264 65120 ?       Ssl   2025  48:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1099524 64396 ?       Ssl   2025  48:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1099648 65756 ?       Ssl   2025  48:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1101160 65636 ?       Ssl   2025  47:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1101408 65696 ?       Ssl   2025  47:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.5  0.7 11703792 117608 ?     Ssl   2025  76:37 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1099512 65100 ?       Ssl   2025  48:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2221904  0.3  0.3 1098844 63192 ?       Ssl  03:03   2:39 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2282177  0.0  0.0   2608   600 ?        S    16:38   0:00 sh -c ps -aux | grep node
www-data 2282179  0.0  0.0   3304   720 ?        S    16:38   0:00 grep node
sasa     2628167  0.9  0.8 1176208 132132 ?      Ssl   2025 884:36 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.7  0.5 11823188 97912 ?      Ssl   2025 636:23 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 83312 ?      Ssl   2025 462:55 node /home/sasa/@mikosoft/dodo-examples/server/index.js