How to tell if node js is installed or not

Question

I ve recently installed node js and I have no idea how to run applications  I installed node js but couldn t find further instructions  What does one really need to do  I wanted to see if it was actually working  So I executed a script called hello js  It went as such   console log  hello world      Now where would this be logged to    Edit  I m running this  js through a  php script

User · Answer

Please try this command node --version or node -v  either of which should return something like v4 4 5

User · Answer

Ctrl   R - to open the command line  and then writes   node -v

User · Answer

open a terminal and enter  node -v   this will tell you the version of the nodejs installed  then run nodejs simple by entering  node   Prompt must be change  Enter following   function testNode    return  Node is working    testNode      command line must prompt the following output if the installation was successful   Node is working

User · Answer

Check the node version using node -v  Check the npm version using npm -v  If these commands gave you version number you are good to go with NodeJs development     Time to test node   Create a Directory using mkdir NodeJs  Inside the NodeJs folder create a file using touch index js  Open your index js either using vi or in your favourite text editor  Type in console log  Welcome to NodesJs    and save it  Navigate back to your saved file and type node index js  If you see Welcome to NodesJs  you did a nice job and you are up with NodeJs

User · Answer

Open a terminal window  Type   node -v   This will display your nodejs version   Navigate to where you saved your script and input   node script js   This will run your script

User · Answer

This is for windows OS but concept can be applied to other OS   Running command node -v will be able to confirm if it is installed  however it will not be able to confirm if it is NOT installed   Executable may not be on your PATH   Two ways you can check if it is actually installed    Check default install location C  Program Files nodejs    or    Go to System Settings - gt  Add or Remove Programs and filter by node  it should show you if you have it installed  For me  it shows as title  Node js  and description  Node js Foundation   with no version specified  Install size is 52 6MB   If you don t have it installed  get it from here https   nodejs org en download

User · Answer

Open the command prompt in Windows or terminal in Linux and Mac Type  node -v   If node is install it will show its version For eg    v6 9 5   Else download it from nodejs org

[javascript] How to tell if node.js is installed or not

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