how to create environments variable in postman

To create an environment variable in Postman, follow these steps:

1. Click on the gear icon in the top right corner of the Postman window.
2. Select "Manage Environments" from the dropdown menu.
3. Click on the "Add" button to create a new environment.
4. Give your environment a name and add any initial key-value pairs that you want to include.
5. To use an environment variable in a request, simply use the syntax {{variable_name}} where you want to substitute the value of the variable.

For example, if you had an environment variable called "base_url" with a value of "https://api.example.com/v1", you could use it in a request like this:

GET {{base_url}}/users

This would substitute the value of the "base_url" variable into the URL of the request, resulting in a final URL of "https://api.example.com/v1/users".