..:: 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 1303692 78696 ?       Ssl  Jun15 224:52 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa         843  0.5  0.7 11711456 124136 ?     Ssl  Jun15 251:55 node /home/sasa/dex8/dex8-api/starter.js
sasa         858  0.3  0.4 1306304 74084 ?       Ssl  Jun15 176:21 node /home/sasa/regoch/regoch-www/server
sasa         867  0.3  0.4 1301192 69740 ?       Ssl  Jun15 161:57 node /home/sasa/dex8/dex8-panel/server/index.js
sasa         886  0.7  0.5 11802388 94620 ?      Ssl  Jun15 350:51 node /home/sasa/dex8/dex8-www/server/index.js
sasa         888  0.5  0.4 11792500 78064 ?      Ssl  Jun15 239:58 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         904  0.7  0.5 1329652 82140 ?       Ssl  Jun15 326:36 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         910  0.3  0.4 1298960 67960 ?       Ssl  Jun15 162:59 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         969  0.3  0.4 1298376 65620 ?       Ssl  Jun15 161:03 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         970  0.6  0.5 11812676 96132 ?      Ssl  Jun15 291:07 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1010  0.6  0.6 1147588 102656 ?      Ssl  Jun15 272:32 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1016  0.7  1.1 11909044 195252 ?     Ssl  Jun15 341:37 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1086  0.3  0.4 11794656 78244 ?      Ssl  Jun15 177:14 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1089  0.3  0.3 1100124 64548 ?       Ssl  Jun15 165:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1159  0.3  0.4 22277692 78224 ?      Ssl  Jun15 170:01 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1160  0.3  0.3 1099100 62908 ?       Ssl  Jun15 165:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1241  0.3  0.3 1101208 62744 ?       Ssl  Jun15 166:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1242  0.4  0.7 22311220 123416 ?     Ssl  Jun15 202:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1323  0.3  0.3 1099612 62996 ?       Ssl  Jun15 166:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1324  0.3  0.3 1100128 63568 ?       Ssl  Jun15 165:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1398  0.3  0.3 1099104 62616 ?       Ssl  Jun15 165:59 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1400  0.3  0.3 1100380 63784 ?       Ssl  Jun15 165:55 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1465  0.3  0.3 1099872 63064 ?       Ssl  Jun15 165:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa      178968  0.8  0.7 11821340 119540 ?     Ssl  Jun17 353:35 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1802958  0.7  0.5 1317300 92532 ?       Rsl  Jul09  70:36 node /home/sasa/crypto/dex-arbitrage-bot/scripts/observer/index-
www-data 2393876  0.0  0.0   2608   600 ?        S    22:02   0:00 sh -c ps -aux | grep node
www-data 2393878  0.0  0.0   3304   668 ?        S    22:02   0:00 grep node