add comment in vs code code example

Example 1: visual studio code uncomment multiple lines

shift+alt+A

Example 2: comment out code visual studio

Ctrl+K+C
Ctrl+K+U

Example 3: commenting in vscode

//To comment a block of code in one go, try Ctrl + K, and the Ctrl + C to
//comment or Ctrl + U to uncomment.

//Pro-Tip: You can also do it without unpressing Ctrl.