..:: Source code - 21var_NaN.js ::..

/**
 * Define NaN
 */

var str='some text'; //string
var numb=parseInt(str); //or parseFloat()

var type=typeof numb;

console.log(type +': '+ numb); //number: NaN
 

..:: NodeJS Console - 21var_NaN.js ::..

$ node 21var_NaN.js
number: NaN
$ps -aux | grep node (list all node processes)
sasa         849  0.5  0.5 1316608 85112 ?       Ssl  Oct08 282:32 node /home/sasa/regoch/regoch-www/server
sasa         880  0.4  0.5 1319240 87296 ?       Ssl  Oct08 235:18 node /home/sasa/dex8/dex8-www/server/index.js
sasa         890  0.5  0.5 11797800 85456 ?      Ssl  Oct08 333:50 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa         903  0.7  0.4 1329652 81432 ?       Ssl  Oct08 430:10 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa         929  0.4  0.4 1300184 68508 ?       Ssl  Oct08 225:51 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa         943  0.4  0.4 1300808 65980 ?       Ssl  Oct08 232:58 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa         980  0.6  0.5 11805104 92536 ?      Ssl  Oct08 364:01 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa         981  0.7  0.6 1148036 104244 ?      Ssl  Oct08 394:23 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1039  0.9  1.4 11941380 241736 ?     Ssl  Oct08 554:26 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa     2044488  0.3  0.4 1298112 67036 ?       Ssl  Nov01  76:57 node /home/sasa/dex8/dex8-panel/server/index.js
sasa     2574087  0.3  0.4 11792920 76996 ?      Ssl  Nov08  41:31 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     2702010  0.4  0.6 22296952 100460 ?     Ssl  Nov10  34:39 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702011  0.3  0.4 1100276 66652 ?       Ssl  Nov10  30:49 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702018  0.3  0.3 1099884 65352 ?       Ssl  Nov10  30:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702019  0.3  0.4 1100516 66644 ?       Ssl  Nov10  30:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702046  0.9  0.7 22315700 123380 ?     Ssl  Nov10  83:12 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702047  0.3  0.3 1099492 65444 ?       Ssl  Nov10  31:08 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702088  0.3  0.3 1100008 65336 ?       Ssl  Nov10  30:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702089  0.3  0.4 1099752 66124 ?       Ssl  Nov10  30:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702137  0.3  0.4 1099864 66172 ?       Ssl  Nov10  30:40 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2702139  0.4  0.6 22297452 101732 ?     Ssl  Nov10  35:09 node /home/sasa/dex8/dex8-worker/starter.js
sasa     3097623  1.2  0.8 11716736 131212 ?     Ssl  Nov13  43:12 node /home/sasa/dex8/dex8-api/starter.js
www-data 3355398  0.0  0.0   2608   600 ?        S    06:28   0:00 sh -c ps -aux | grep node
www-data 3355400  0.0  0.0   3304   724 ?        S    06:28   0:00 grep node