Why doesn't the openssl command work on the Windows 10 command line?

Question

OpenSSL

I installed OpenSSL on my Windows 10. But I can't use it... I installed it as an
installer (downloaded the distribution kit). That is, I did not collect it myself. During installation, there were no questions / settings.
I'm trying to make a TLS certificate with the command:
openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout key.pem -out cert.pem
Response says: "openssl" is not an internal or external
command, operable program or batch file .

What could be the matter?

Answer 1

Specify the full path to the installed openssl or set this path in the PATH environment variable.