When to use plus (+) and comma (,) inside a console.log in javascript?

Question

Hello, I came to a part in my javascript tutorial wherein I was introduced with a comma (,) for somewhat like a string concatenation. I thought I can only use + when joining strings or variables. Here is the example code.

let weather = 'sunny'
console.log('The weather today is ' , weather)

Result: The weather today is sunny.

Using the + sign will produce the same results. I just want to know when to use the right operator. This may have been introduced in the earlier part of the tutorial but I completely missed this out. Thank you for the help.

Answer 1

https://developer.mozilla.org/en-US/docs/Web/API/console#outputting_text_to_the_console