..:: 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 1303644 80316 ?       Ssl  Oct24  94:28 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.9  0.8 11720688 135536 ?     Ssl  Oct24 168:40 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.4  0.4 1303480 71192 ?       Ssl  Oct24  72:03 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.3  0.4 1304912 71564 ?       Ssl  Oct24  67:30 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.6 11824420 112184 ?     Ssl  Oct24 148:29 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.5 11812364 96556 ?      Ssl  Oct24  98:15 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.7  0.4 1329104 81420 ?       Ssl  Oct24 129:33 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1298500 66828 ?       Ssl  Oct24  68:26 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.3 1296872 64936 ?       Ssl  Oct24  67:23 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1292  0.5  0.5 11809540 93412 ?      Ssl  Oct24 105:27 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1363  2.9  2.8 12160876 466600 ?     Ssl  Oct24 524:28 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1441  0.4  0.4 11794584 77944 ?      Ssl  Oct24  72:51 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1449  0.3  0.3 1165544 64204 ?       Ssl  Oct24  70:47 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  1.8  2.7 22653916 445684 ?     Ssl  Oct24 335:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.3 1099620 64040 ?       Ssl  Oct24  70:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.3 1098852 62732 ?       Ssl  Oct24  70:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1099620 63704 ?       Ssl  Oct24  70:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.3 1099880 64316 ?       Ssl  Oct24  70:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1099364 63896 ?       Ssl  Oct24  70:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.3 1100384 65232 ?       Ssl  Oct24  70:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1099872 64008 ?       Ssl  Oct24  69:14 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1098856 63952 ?       Ssl  Oct24  69:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  1.1  0.7 11832880 127668 ?     Ssl  Oct24 195:37 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     2628167  0.9  0.6 1150268 105620 ?      Ssl  Nov04  14:55 node /home/sasa/voovuu/voovuu-api/starter.js
www-data 2908833  0.0  0.0   2608   536 ?        S    22:13   0:00 sh -c ps -aux | grep node
www-data 2908835  0.0  0.0   3304   716 ?        S    22:13   0:00 grep node