..:: 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         831  0.5  0.4 1303528 77752 ?       Ssl  Jun15 108:55 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.5  0.6 11699508 104300 ?     Ssl  Jun15 103:26 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.4  0.4 1302344 70196 ?       Ssl  Jun15  81:42 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.3 1298972 65588 ?       Ssl  Jun15  77:17 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.8  0.6 11833768 111520 ?     Ssl  Jun15 164:24 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.5  0.4 11792244 78192 ?      Ssl  Jun15 112:32 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.7  0.4 1329652 81724 ?       Ssl  Jun15 149:33 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.4 1300240 69548 ?       Ssl  Jun15  78:02 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.3 1297484 64772 ?       Ssl  Jun15  77:06 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.6  0.5 11798692 88416 ?      Ssl  Jun15 138:20 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.6  0.6 1145428 101280 ?      Ssl  Jun15 129:56 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.8  1.1 11878864 187244 ?     Ssl  Jun15 169:00 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.4  0.4 11794656 77728 ?      Ssl  Jun15  83:26 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1099612 64880 ?       Ssl  Jun15  79:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.4 22276156 75772 ?      Ssl  Jun15  80:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099612 64316 ?       Ssl  Jun15  79:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1100952 62976 ?       Ssl  Jun15  79:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.4  0.5 22284124 82900 ?      Ssl  Jun15  84:02 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099100 63104 ?       Ssl  Jun15  79:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1099616 63992 ?       Ssl  Jun15  79:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099104 63748 ?       Ssl  Jun15  79:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1099356 64008 ?       Ssl  Jun15  79:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1099104 64312 ?       Ssl  Jun15  79:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa      178968  0.8  0.5 11810360 96996 ?      Ssl  Jun17 139:52 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      337381  1.3  0.5 1318336 89228 ?       Ssl  Jun19 185:58 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/index2
www-data 1028278  0.0  0.0   2608   600 ?        S    02:56   0:00 sh -c ps -aux | grep node
www-data 1028280  0.0  0.0   3304   724 ?        S    02:56   0:00 grep node