..:: Source code - 033string_minus.js ::..

/**
 * Minus operator
 */
var x, y, c;

x = 'str1';
y = 'str2';

c = x - y;

console.log(c); //NaN
 

..:: NodeJS Console - 033string_minus.js ::..

$ node 033string_minus.js
NaN
$ps -aux | grep node (list all node processes)
sasa        1197  1.3  0.6 1326956 99588 ?       Ssl  Oct18 307:49 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1211  8.6  0.7 11710212 115736 ?     Ssl  Oct18 1922:06 node /home/sasa/dex8/dex8-api/starter.js
sasa        1218  0.4  0.5 11801072 84724 ?      Ssl  Oct18  98:12 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1219  0.7  0.5 11806284 95836 ?      Ssl  Oct18 171:04 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1232  0.4  0.5 11806908 89584 ?      Ssl  Oct18 100:55 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1248  0.6  0.5 1339320 85252 ?       Ssl  Oct18 142:38 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1274  0.3  0.4 1300692 68180 ?       Ssl  Oct18  69:26 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1277  0.3  0.3 1298272 64572 ?       Ssl  Oct18  68:15 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1335  0.4  0.8 11861728 138868 ?     Ssl  Oct18 100:00 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1337  0.6  0.7 1163528 115976 ?      Ssl  Oct18 151:47 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1385  3.7  3.8 12359564 630860 ?     Ssl  Oct18 822:45 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1387  0.3  0.4 11797452 80692 ?      Ssl  Oct18  74:39 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1457  0.3  0.3 1099616 62424 ?       Ssl  Oct18  69:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1458  0.3  0.4 22278316 77300 ?      Ssl  Oct18  70:43 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1514  0.3  0.3 1100004 63752 ?       Ssl  Oct18  69:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1515  0.3  0.3 1099620 63536 ?       Ssl  Oct18  69:17 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1593  0.3  0.3 1099616 63456 ?       Ssl  Oct18  69:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1595  0.3  0.3 1099616 63512 ?       Ssl  Oct18  69:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1660  0.3  0.3 1099760 63632 ?       Ssl  Oct18  69:16 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1661  0.3  0.3 1099360 63928 ?       Ssl  Oct18  69:21 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1732  0.3  0.3 1099616 63556 ?       Ssl  Oct18  69:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1734  0.3  0.3 1099616 63652 ?       Ssl  Oct18  69:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1792  0.4  0.5 11803772 91840 ?      Ssl  Oct18 106:32 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      367378  0.6  0.5 1331052 84204 ?       Ssl  Oct21 111:39 node /home/sasa/miko/miko-hr/api/starter.js
sasa      367471  1.2  1.0 11872840 172732 ?     Ssl  Oct21 216:46 node /home/sasa/miko/miko-hr/server/index.js
www-data 1702857  0.0  0.0   2608   592 ?        S    22:39   0:00 sh -c ps -aux | grep node
www-data 1702859  0.0  0.0   3304   716 ?        S    22:39   0:00 grep node