text: and they can be set and changed without having to modify your code.\n\nIn Deno, environment variables are defined using the `export` command. For example, to set a variable called `VAR_NAME` to the value `value`, you would use the following command:\n\n```sh\nexport VAR_NAME=value\n```\n\nYou can then access the value of the environment variable in your code using the `Deno.env.get()` method. For example, if you wanted to log the value of the `VAR_NAME` variable, you could use the following code:\n\n```js\nconsole.log(Deno.env.get('VAR_NAME'));\n```\n\nYou can also set environment variables for a single command. To do this, you can list the environment variables before the command, like so:\n\n```\nVAR=hello VAR2=bye deno run main.ts\n```\n\nThis will set the environment variables `VAR` and `V"}, {'text': "\n\nEnvironment variables are a powerful tool for managing settings and configuration in your applications. They can be used to store information such as user preferences, application settings, and even passwords. In this blog post, we'll discuss how to make Deno scripts executable with a hashbang (shebang).\n\nA hashbang is a line of code that is placed at the beginning of a script. It tells the system which interpreter to use when running the script. In the case of Deno, the hashbang should be `#!/usr/bin/env -S deno run --allow-env`. This tells the system to use the Deno interpreter and to allow the script to access environment variables.\n\nOnce the hashbang is in place, you may need to give the script execution permissions. On Linux, this can be done with the command `sudo chmod +x hashbang.ts`. After that, you can execute the script by calling it like any other command: