..:: 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  0.4  0.5 1305996 85780 ?       Ssl   2025 1292:39 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304488 73148 ?       Ssl   2025 930:48 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11819604 107616 ?     Ssl   2025 1472:03 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73700 ?       Ssl   2025 944:26 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 68176 ?       Ssl   2025 929:22 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.7 12154080 455940 ?     Ssl   2025 12056:07 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.0  2.7 12116568 449848 ?     Ssl   2025 10657:43 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125416 ?     Ssl   2025 660:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101568 66288 ?       Ssl   2025 580:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1101060 65364 ?       Ssl   2025 578:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1103080 68540 ?       Ssl   2025 583:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100804 64216 ?       Ssl   2025 580:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65864 ?       Ssl   2025 578:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100648 64836 ?       Ssl   2025 570:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100384 63376 ?       Ssl   2025 568:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11708988 123136 ?     Ssl   2025 1133:54 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100536 64072 ?       Ssl   2025 578:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.7  0.6 11849184 107244 ?     Ssl  Apr20  58:42 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.4  0.7 11828184 114924 ?     Ssl  Apr25   5:12 node /home/sasa/miko/miko-hr/server/index.js
sasa     1979731  0.3  0.3 1095772 60492 ?       Ssl  04:03   0:06 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1982003  0.0  0.0   2608   592 ?        S    04:33   0:00 sh -c ps -aux | grep node
www-data 1982005  0.0  0.0   3304   712 ?        S    04:33   0:00 grep node
sasa     2628167  0.8  0.8 1176664 131436 ?      Ssl   2025 2113:12 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11803144 91352 ?      Ssl   2025 1526:36 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84416 ?      Ssl   2025 1262:21 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1332748 86332 ?       Ssl  Feb21 637:03 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js