..:: 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 1303628 82168 ?       Ssl  Oct24 182:33 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11722168 138072 ?     Ssl  Oct24 311:18 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.4  0.4 1305044 72916 ?       Ssl  Oct24 143:55 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.4  0.4 1304912 72664 ?       Ssl  Oct24 130:42 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  1.0  0.6 11823816 101388 ?     Ssl  Oct24 327:04 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.5 11812620 96928 ?      Ssl  Oct24 197:39 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.4 1329104 81724 ?       Ssl  Oct24 255:30 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.4  0.4 1300740 69868 ?       Ssl  Oct24 132:38 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.4  0.4 1297184 66420 ?       Ssl  Oct24 130:59 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  3.1  2.7 12148436 451744 ?     Ssl  Oct24 1011:59 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1449  0.4  0.3 1165544 63704 ?       Ssl  Oct24 137:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.7  2.6 22622544 431552 ?     Ssl  Oct24 552:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.4  0.3 1099620 63560 ?       Ssl  Oct24 137:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.4  0.3 1098340 62156 ?       Ssl  Oct24 137:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.4  0.3 1099620 63504 ?       Ssl  Oct24 136:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.4  0.3 1099624 64168 ?       Ssl  Oct24 136:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.4  0.3 1099620 63384 ?       Ssl  Oct24 136:51 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.4  0.3 1100384 64964 ?       Ssl  Oct24 136:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.4  0.3 1100640 64924 ?       Ssl  Oct24 134:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.4  0.3 1099880 64376 ?       Ssl  Oct24 134:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.4  0.9 11845436 147840 ?     Ssl  Oct24 469:11 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  325617  0.0  0.0   2608   524 ?        S    00:09   0:00 sh -c ps -aux | grep node
www-data  325619  0.0  0.0   3304   716 ?        S    00:09   0:00 grep node
sasa     2628167  0.9  0.7 1161136 116444 ?      Ssl  Nov04 153:37 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.7  0.5 11814052 97072 ?      Ssl  Nov06  96:12 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.4  0.5 11798408 83024 ?      Ssl  Nov06  65:39 node /home/sasa/@mikosoft/dodo-examples/server/index.js