..:: 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        1208  0.3  0.4 1305000 73444 ?       Ssl   2025 1118:04 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11821528 105996 ?     Ssl   2025 1766:48 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304328 71792 ?       Ssl   2025 1133:33 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298028 67092 ?       Ssl   2025 1116:33 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.7 12147580 446120 ?     Ssl   2025 14181:34 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.3  3.5 12245844 586096 ?     Ssl   2025 17299:34 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125992 ?     Ssl   2025 869:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101824 65832 ?       Ssl   2025 779:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101316 65896 ?       Ssl   2025 777:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101544 65528 ?       Ssl   2025 783:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101572 65692 ?       Ssl   2025 779:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.3 1100672 65316 ?       Ssl   2025 777:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166440 64740 ?       Ssl   2025 767:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1101152 65620 ?       Ssl   2025 764:53 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11844444 124876 ?     Ssl   2025 1640:02 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1103096 66756 ?       Ssl   2025 777:04 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.8 11858420 133060 ?     Ssl  Apr20 550:19 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1302516 77488 ?       Ssl  May31  42:17 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.7 11835636 129292 ?     Ssl  Apr25 371:32 node /home/sasa/miko/miko-hr/server/index.js
sasa     2259222  0.3  0.5 22292832 97040 ?      Ssl  Jun05   8:16 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2460031  0.0  0.0   2608   528 ?        S    21:52   0:00 sh -c ps -aux | grep node
www-data 2460033  0.0  0.0   3304   724 ?        S    21:52   0:00 grep node
sasa     2628167  0.8  0.8 1177052 132260 ?      Ssl   2025 2532:31 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11814200 103428 ?     Ssl   2025 1876:16 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84120 ?      Ssl   2025 1561:40 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332680 86400 ?       Ssl  Feb21 1070:49 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js