..:: 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  0.4 1303024 81288 ?       Ssl  Oct24 229:35 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11722576 139480 ?     Ssl  Oct24 402:35 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.4  0.4 1305712 73848 ?       Ssl  Oct24 184:46 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304400 72184 ?       Ssl  Oct24 163:58 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.9  0.5 11801380 93448 ?      Ssl  Oct24 400:24 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11813388 98300 ?      Ssl  Oct24 250:12 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.5 1330592 84248 ?       Ssl  Oct24 328:17 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1301160 70272 ?       Ssl  Oct24 166:32 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298736 68208 ?       Ssl  Oct24 164:23 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.2  2.7 12150484 445072 ?     Ssl  Oct24 1371:47 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.4  0.4 1168616 65904 ?       Ssl  Oct24 172:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.8  2.7 22650696 445168 ?     Ssl  Oct24 765:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.4  0.3 1099876 63628 ?       Ssl  Oct24 172:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.4  0.3 1099620 63316 ?       Ssl  Oct24 172:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.4  0.3 1099876 63664 ?       Ssl  Oct24 171:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.4  0.3 1100392 64868 ?       Ssl  Oct24 171:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.4  0.3 1100644 64620 ?       Ssl  Oct24 171:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.4  0.3 1100384 65000 ?       Ssl  Oct24 171:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1100384 63748 ?       Ssl  Oct24 168:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1099880 63760 ?       Ssl  Oct24 169:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.5  0.9 11854068 156424 ?     Ssl  Oct24 658:15 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data 2324645  0.0  0.0   2608   536 ?        S    02:39   0:00 sh -c ps -aux | grep node
www-data 2324647  0.0  0.0   3304   720 ?        S    02:39   0:00 grep node
sasa     2628167  0.8  0.7 1165660 121248 ?      Ssl  Nov04 230:53 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11800504 89616 ?      Ssl  Nov06 156:36 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.4  0.5 11798408 83088 ?      Ssl  Nov06 103:39 node /home/sasa/@mikosoft/dodo-examples/server/index.js